← Latin for Lawyers, Judges and Notaries Public
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The Critical Distinction in Legal Latin
Welcome to Lesson 28 of our specialized Latin course for legal professionals. Today we examine one of the most significant grammatical distinctions in Latin legal writing: the difference between reflexive possession (suus, sua, suum — “his/her/its/their own”) and non-reflexive possession (eius, eorum, earum — “his/her/its/their” referring to another person). This distinction appears constantly in legal documents, court proceedings, and notarial instruments, where precise attribution of ownership, rights, and obligations determines the meaning of legal texts.
The reflexive possessive suus always refers back to the subject of its clause, indicating that the subject possesses something. The non-reflexive genitives eius (singular) and eorum/earum (plural) indicate possession by someone other than the subject. Mastering this distinction prevents ambiguity in contracts, wills, judicial opinions, and all manner of legal instruments.
Course Index: https://latinum.substack.com/p/index
FAQ: What does suus mean in legal Latin?
Suus, sua, suum functions as a reflexive possessive adjective meaning “his own,” “her own,” “its own,” or “their own,” always referring to the subject of the clause in which it appears. In legal contexts, suus appears in foundational phrases including sua sponte (of one’s own accord — describing judicial actions taken without party request), sui iuris (of one’s own right — describing legal capacity and independence), and suus heres (one’s own heir — describing heirs who were under the deceased’s legal power). When Latin requires possession by someone other than the subject, the genitive forms eius (his/her/its) or eorum/earum (their) must be used instead.
Key Takeaways
⚖ Suus, sua, suum always refers to the subject of its own clause — this reflexive nature prevents ambiguity about who possesses what
⚖ Eius (singular) and eorum/earum (plural) refer to possession by someone other than the subject — failure to observe this distinction changes legal meaning
⚖ Suus agrees with the thing possessed in gender, number, and case — not with the possessor (unlike English)
⚖ Sua sponte describes courts acting on their own initiative without party motion — essential terminology for appellate practice
⚖ Sui iuris describes legal capacity and independence — the opposite of being under another’s authority (alieni iuris)
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28.1a Iūdex suā sponte causam dīmīsit.
28.1b Iūdex (ˈjuː.deks) judge-NOM suā (ˈsu.aː) his-own-ABL.F.SG sponte (ˈspon.te) will-ABL causam (ˈkau̯.sam) case-ACC dīmīsit (diːˈmiː.sit) dismissed-3SG.PERF
28.2a Testātor suōs hērēdēs in testāmentō nōmināvit.
28.2b Testātor (tesˈtaː.tor) testator-NOM suōs (ˈsu.oːs) his-own-ACC.M.PL hērēdēs (heːˈreː.deːs) heirs-ACC in (in) in testāmentō (tesˈtaː.men.toː) testament-ABL nōmināvit (noːˈmiː.naː.wit) named-3SG.PERF
28.3a Reus eius advocātum recūsāvit.
28.3b Reus (ˈre.us) defendant-NOM eius (ˈe.jus) his-GEN.SG advocātum (ad.woˈkaː.tum) advocate-ACC recūsāvit (re.kuːˈsaː.wit) rejected-3SG.PERF
28.4a Notārius suam subscrīptiōnem appōsuit.
28.4b Notārius (noˈtaː.ri.us) notary-NOM suam (ˈsu.am) his-own-ACC.F.SG subscrīptiōnem (sub.skriːpˈti.oː.nem) signature-ACC appōsuit (apˈpoː.su.it) affixed-3SG.PERF
28.5a Dēfūnctus suīs līberīs patrimōnium relīquit.
28.5b Dēfūnctus (deːˈfuŋk.tus) deceased-NOM suīs (ˈsu.iːs) his-own-DAT.PL līberīs (ˈliː.be.riːs) children-DAT patrimōnium (pa.triˈmoː.ni.um) estate-ACC relīquit (reˈliː.kwit) left-3SG.PERF
28.6a Iūdex suō iūre sententiam prōnūntiāvit.
28.6b Iūdex (ˈjuː.deks) judge-NOM suō (ˈsu.oː) his-own-ABL.N.SG iūre (ˈjuː.re) right-ABL sententiam (senˈten.ti.am) judgment-ACC prōnūntiāvit (proːˌnuːn.tiˈaː.wit) pronounced-3SG.PERF
28.7a Lītigātor eōrum argūmenta refūtāvit.
28.7b Lītigātor (liːˈti.gaː.tor) litigant-NOM eōrum (eˈoː.rum) their-GEN.M.PL argūmenta (ar.guːˈmen.ta) arguments-ACC refūtāvit (re.fuːˈtaː.wit) refuted-3SG.PERF
28.8a Cūrātor suī pūpillī rēs administrāvit.
28.8b Cūrātor (kuːˈraː.tor) guardian-NOM suī (ˈsu.iː) his-own-GEN.M.SG pūpillī (puːˈpil.liː) ward-GEN rēs (reːs) affairs-ACC administrāvit (ad.miˌnisˈtraː.wit) administered-3SG.PERF
28.9a Persōna suī iūris contrāctum suō nōmine iniit.
28.9b Persōna (perˈsoː.na) person-NOM suī (ˈsu.iː) of-own-GEN iūris (ˈjuː.ris) right-GEN contrāctum (konˈtrak.tum) contract-ACC suō (ˈsu.oː) his-own-ABL.N.SG nōmine (ˈnoː.mi.ne) name-ABL iniit (ˈi.ni.it) entered-3SG.PERF
28.10a Tribūnal eius petītiōnem dēnegāvit.
28.10b Tribūnal (triˈbuː.nal) tribunal-NOM eius (ˈe.jus) his-GEN.SG petītiōnem (pe.tiːˈti.oː.nem) petition-ACC dēnegāvit (deːˈne.gaː.wit) denied-3SG.PERF
28.11a Magistrātus suā sponte inquisītiōnem in eius negōtia instituit.
28.11b Magistrātus (ma.gisˈtraː.tus) magistrate-NOM suā (ˈsu.aː) his-own-ABL.F.SG sponte (ˈspon.te) will-ABL inquisītiōnem (in.kwiˌsiːˈti.oː.nem) investigation-ACC in (in) into eius (ˈe.jus) his-GEN.SG negōtia (neˈgoː.ti.a) affairs-ACC instituit (inˈsti.tu.it) instituted-3SG.PERF
28.12a Hērēdēs suās partes secundum testāmentum accēpērunt.
28.12b Hērēdēs (heːˈreː.deːs) heirs-NOM suās (ˈsu.aːs) their-own-ACC.F.PL partes (ˈpar.teːs) portions-ACC secundum (seˈkun.dum) according-to testāmentum (tesˈtaː.men.tum) testament-ACC accēpērunt (ak.keːˈpeː.runt) received-3PL.PERF
28.13a Advocātus suī clientis causam ēgit, nōn eōrum.
28.13b Advocātus (ad.woˈkaː.tus) advocate-NOM suī (ˈsu.iː) his-own-GEN.M.SG clientis (kliˈen.tis) client-GEN causam (ˈkau̯.sam) case-ACC ēgit (ˈeː.git) pleaded-3SG.PERF nōn (noːn) not eōrum (eˈoː.rum) their-GEN.M.PL
28.14a Suus hērēs sine ūllā āctiōne patrimōnium acquīrit.
28.14b Suus (ˈsu.us) own-NOM.M.SG hērēs (ˈheː.reːs) heir-NOM sine (ˈsi.ne) without ūllā (ˈuːl.laː) any-ABL.F.SG āctiōne (akˈti.oː.ne) action-ABL patrimōnium (pa.triˈmoː.ni.um) estate-ACC acquīrit (akˈkwiː.rit) acquires-3SG.PRES
28.15a Iūdex eārum testimōnia audīvit et suam opīniōnem formāvit.
28.15b Iūdex (ˈjuː.deks) judge-NOM eārum (eˈaː.rum) their-GEN.F.PL testimōnia (tesˌtiˈmoː.ni.a) testimonies-ACC audīvit (au̯ˈdiː.wit) heard-3SG.PERF et (et) and suam (ˈsu.am) his-own-ACC.F.SG opīniōnem (o.piːˈni.oː.nem) opinion-ACC formāvit (forˈmaː.wit) formed-3SG.PERF
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28.1 Iūdex suā sponte causam dīmīsit. “The judge dismissed the case of his own accord.”
28.2 Testātor suōs hērēdēs in testāmentō nōmināvit. “The testator named his own heirs in the will.”
28.3 Reus eius advocātum recūsāvit. “The defendant rejected his [another person’s] advocate.”
28.4 Notārius suam subscrīptiōnem appōsuit. “The notary affixed his own signature.”
28.5 Dēfūnctus suīs līberīs patrimōnium relīquit. “The deceased left the estate to his own children.”
28.6 Iūdex suō iūre sententiam prōnūntiāvit. “The judge pronounced judgment by his own right.”
28.7 Lītigātor eōrum argūmenta refūtāvit. “The litigant refuted their [the opposing parties’] arguments.”
28.8 Cūrātor suī pūpillī rēs administrāvit. “The guardian administered the affairs of his own ward.”
28.9 Persōna suī iūris contrāctum suō nōmine iniit. “The person of independent legal capacity entered the contract in his own name.”
28.10 Tribūnal eius petītiōnem dēnegāvit. “The tribunal denied his [another person’s] petition.”
28.11 Magistrātus suā sponte inquisītiōnem in eius negōtia instituit. “The magistrate on his own initiative instituted an investigation into his [another person’s] affairs.”
28.12 Hērēdēs suās partes secundum testāmentum accēpērunt. “The heirs received their own portions according to the will.”
28.13 Advocātus suī clientis causam ēgit, nōn eōrum. “The advocate pleaded the case of his own client, not theirs.”
28.14 Suus hērēs sine ūllā āctiōne patrimōnium acquīrit. “An heir-at-law acquires the estate without any formal action.”
28.15 Iūdex eārum testimōnia audīvit et suam opīniōnem formāvit. “The judge heard their [the witnesses’] testimonies and formed his own opinion.”
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28.1 Iūdex suā sponte causam dīmīsit.
28.2 Testātor suōs hērēdēs in testāmentō nōmināvit.
28.3 Reus eius advocātum recūsāvit.
28.4 Notārius suam subscrīptiōnem appōsuit.
28.5 Dēfūnctus suīs līberīs patrimōnium relīquit.
28.6 Iūdex suō iūre sententiam prōnūntiāvit.
28.7 Lītigātor eōrum argūmenta refūtāvit.
28.8 Cūrātor suī pūpillī rēs administrāvit.
28.9 Persōna suī iūris contrāctum suō nōmine iniit.
28.10 Tribūnal eius petītiōnem dēnegāvit.
28.11 Magistrātus suā sponte inquisītiōnem in eius negōtia instituit.
28.12 Hērēdēs suās partes secundum testāmentum accēpērunt.
28.13 Advocātus suī clientis causam ēgit, nōn eōrum.
28.14 Suus hērēs sine ūllā āctiōne patrimōnium acquīrit.
28.15 Iūdex eārum testimōnia audīvit et suam opīniōnem formāvit.
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These are the grammar rules for suus/eius in Latin legal writing:
The Reflexive Possessive: Suus, Sua, Suum
The reflexive possessive adjective suus, sua, suum declines as a first and second declension adjective. It always refers back to the subject of its own clause, indicating that the subject possesses the modified noun. The same forms serve for “his own,” “her own,” “its own,” and “their own” — context and the subject determine the translation.
Singular declension: Masculine — suus (nominative), suī (genitive), suō (dative), suum (accusative), suō (ablative). Feminine — sua (nominative), suae (genitive), suae (dative), suam (accusative), suā (ablative). Neuter — suum (nominative), suī (genitive), suō (dative), suum (accusative), suō (ablative).
Plural declension: Masculine — suī (nominative), suōrum (genitive), suīs (dative), suōs (accusative), suīs (ablative). Feminine — suae (nominative), suārum (genitive), suīs (dative), suās (accusative), suīs (ablative). Neuter — sua (nominative), suōrum (genitive), suīs (dative), sua (accusative), suīs (ablative).
Critical Rule: Suus agrees with the thing possessed, not with the possessor. Thus “suam sententiam” (his own judgment) uses feminine accusative because sententia is feminine, regardless of whether the possessor (judge, magistrate) is male or female.
The Non-Reflexive Genitive: Eius, Eōrum, Eārum
When possession belongs to someone other than the subject, Latin uses the genitive forms of is, ea, id: eius (his/her/its, singular) or eōrum (their, masculine/neuter plural) or eārum (their, feminine plural). These forms do not change for the gender of the possessed noun — they reflect only the gender and number of the possessor.
Example contrast: “Iūdex suam sententiam prōnūntiāvit” (The judge pronounced his own judgment) versus “Iūdex eius sententiam cōnfīrmāvit” (The judge confirmed his [another person’s] judgment).
Legal Formulae Employing Suus
Sua sponte means “of one’s own accord” or “of one’s own will.” In modern legal usage, sua sponte describes judicial action taken without any party’s request. A court acting sua sponte raises jurisdictional issues, dismisses cases, recuses judges, or corrects errors on its own initiative. The ablative feminine suā agrees with sponte (ablative of spōns, spontis, feminine — will, volition).
Suī iūris (genitive construction) means “of one’s own right” and describes a person with full legal capacity who is not under another’s authority. The opposite term, aliēnī iūris, describes persons under another’s legal power, such as minors or those under guardianship. A person suī iūris can sue and be sued in their own name, enter contracts independently, and manage their own affairs.
Suus hērēs (one’s own heir) in Roman law designated an heir who was under the patria potestās (paternal power) of the deceased at the time of death. Such heirs — typically children and grandchildren — inherited automatically without need to formally accept the inheritance, unlike external heirs (extrāneī hērēdēs) who required formal acceptance.
Suō nōmine (in one’s own name) indicates that a person acts in personal capacity rather than as representative or agent for another. Notarial documents often distinguish between acts performed suō nōmine and acts performed on behalf of a principal.
Common Mistakes
Using suus when the possessor differs from the subject: “Advocātus suam causam ēgit” means the advocate pleaded his own case. If he pleaded another’s case, the correct form is “Advocātus eius causam ēgit.”
Matching suus to possessor gender: English speakers sometimes expect “suus” for male possessors and “sua” for female possessors. In Latin, the form depends entirely on the possessed noun: “suam uxōrem” (his own wife — feminine because uxor is feminine), “suum marītum” (her own husband — masculine because marītus is masculine).
Forgetting reflexive reference in subordinate clauses: In complex sentences, suus in a subordinate clause usually refers to the subject of the main clause: “Testātor dīxit sē suōs hērēdēs nōminātūrum esse” (The testator said that he would name his own heirs).
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The Sua Sponte Doctrine in Modern Courts
The Latin phrase sua sponte has achieved remarkable longevity in common law jurisdictions. When an appellate court notes that it raises an issue sua sponte, the court signals that neither party briefed or argued the matter — the court identified it independently. This power enables courts to address fundamental defects, particularly jurisdictional issues, that parties might overlook or deliberately ignore.
In American federal practice, courts routinely address subject matter jurisdiction sua sponte, as federal courts have limited jurisdiction that cannot be conferred by party consent. The Supreme Court in cases including Carlisle v. United States (1996) and Trest v. Cain (1997) has examined the boundaries of sua sponte judicial action. However, courts cannot raise new factual claims sua sponte that were not pleaded or developed in the record below.
The variant phrase suo motu or suo moto (on its own motion) appears in many jurisdictions, particularly those influenced by continental European legal traditions. Indian courts frequently employ suo motu proceedings to address matters of public interest.
Sui Iuris and Legal Capacity
The concept of sui iuris originated in Roman family law, where the paterfamilias held extensive power (patria potestās) over family members. Children, regardless of age, remained under paternal power (aliēnī iūris) until the father’s death, emancipation, or certain other events freed them to become sui iuris.
Modern civil law systems derived from Roman law retain sui iuris as a term for full legal capacity. A person sui iuris can enter contracts, make wills, sue and be sued, and generally manage their own legal affairs without need for a guardian, curator, or other representative. Persons lacking such capacity — minors, those with certain mental disabilities — remain under protective supervision (aliēnī iūris) and require representatives for legal transactions.
The phrase sui iuris also appears in ecclesiastical law. The Code of Canons of the Eastern Churches designates certain Catholic churches as sui iuris, meaning they possess their own autonomous governance under the Pope but are not subject to the Latin Church’s canon law. The largest such church is the Latin Church itself, with numerous Eastern Catholic churches maintaining sui iuris status.
Roman Inheritance and the Suus Heres
In Roman inheritance law, the suus heres occupied a privileged position. As described by the jurist Gaius in his Institutes (c. 170 AD), those who were in the power (in potestāte) of the deceased at death — children, grandchildren through males — became suī hērēdēs upon the testator’s death. They acquired the inheritance automatically, without formal acceptance.
This automatic inheritance carried both benefit and burden. The suus heres received the estate’s assets but also assumed all debts, potentially to their own financial ruin. Later Roman law developed protective measures, including the beneficium abstinendī (right of abstention) allowing suī hērēdēs to refrain from involvement with an insolvent estate.
External heirs (extrāneī hērēdēs) — persons not under the deceased’s potestās — required formal acceptance (aditio hereditātis) to become heirs. This distinction between automatic and voluntary succession influenced inheritance systems throughout Europe and remains visible in modern civil law jurisdictions.
Notarial Applications
Notaries public regularly encounter the suus/eius distinction in authentication of documents. When a person appears before a notary acting suō nōmine (in their own name), the notary verifies their identity and capacity. When appearing for another, the notary must verify the authority granting such representative power.
The phrase suā manū (by one’s own hand) appears in document authentication to indicate personal signature or writing, as opposed to marks made by others or by mechanical means. Holographic wills — those written entirely suā manū — receive special treatment in many jurisdictions.
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The following passage from Gaius’s Institutes (c. 170 AD), Book I, §48-49, establishes the foundational distinction between persons sui iuris and those under another’s power — a distinction that pervades all of Roman private law.
F-A: Interlinear Construed Text
Et (et) and quīdam (ˈkwiː.dam) certain quī (kwiː) who in (in) in potestāte (po.tesˈtaː.te) power-ABL nostrā (ˈnos.traː) our-ABL sunt (sunt) are-3PL, quīdam (ˈkwiː.dam) certain quī (kwiː) who in (in) in manū (ˈma.nuː) hand-ABL, quīdam (ˈkwiː.dam) certain quī (kwiː) who in (in) in mancipiō (manˈki.pi.oː) bondage-ABL. Videāmus (wiˈdeː.aː.mus) let-us-see-1PL.SUBJ nunc (nuŋk) now dē (deː) concerning iīs (iːs) those-ABL quī (kwiː) who in (in) in potestāte (po.tesˈtaː.te) power-ABL nostrā (ˈnos.traː) our-ABL sunt (sunt) are. Quod (kwod) which iūs (juːs) right-NOM prōprium (ˈproːp.ri.um) particular-NOM cīvium (ˈkiː.wi.um) citizens-GEN Rōmānōrum (roːˈmaː.noː.rum) Roman-GEN est (est) is-3SG. Nūllī (ˈnuːl.liː) no-one-DAT enim (ˈe.nim) for aliī (ˈa.li.iː) other-DAT sunt (sunt) are populī (ˈpo.pu.liː) peoples-DAT quī (kwiː) who tālem (ˈtaː.lem) such-ACC in (in) over līberōs (ˈliː.be.roːs) children-ACC suōs (ˈsu.oːs) their-own-ACC habent (ˈha.bent) have-3PL potestātem (po.tesˈtaː.tem) power-ACC quālem (ˈkwaː.lem) such-as-ACC nōs (noːs) we habēmus (haˈbeː.mus) have-1PL.
F-B: Natural Text with Translation
Et quidam qui in potestate nostra sunt, quidam qui in manu, quidam qui in mancipio. Videamus nunc de iis qui in potestate nostra sunt. Quod ius proprium civium Romanorum est. Nulli enim alii sunt populi qui talem in liberos suos habent potestatem qualem nos habemus.
“And some persons are in our power, some in our hand, and some in our bondage. Let us now consider those who are in our power. This right is peculiar to Roman citizens. For no other peoples exist who have such power over their children as we have.”
— Gaius, Institutes, Book I, §§48-49 (c. 170 AD)
F-C: Latin Text Only
Et quidam qui in potestate nostra sunt, quidam qui in manu, quidam qui in mancipio. Videamus nunc de iis qui in potestate nostra sunt. Quod ius proprium civium Romanorum est. Nulli enim alii sunt populi qui talem in liberos suos habent potestatem qualem nos habemus.
F-D: Vocabulary and Grammar Notes
The key phrase “in līberōs suōs” (over their own children) exemplifies reflexive possession. The reflexive suōs refers to the subject “populī” (peoples) — each people has power over its own children. Note that suōs is masculine accusative plural, agreeing with līberōs (children), not with populī.
The term potestās (power, authority) gives rise to the fundamental distinction: persons in potestāte are under another’s power (aliēnī iūris), while those free from such power are suī iūris (of their own right). The related phrase patria potestās describes specifically the father’s power over children.
The phrases “in manū” (in hand — a form of marital power) and “in mancipiō” (in bondage — a form of quasi-servile status for free persons) represent other categories of diminished legal capacity in Roman law.
F-E: Commentary
This passage from Gaius demonstrates Roman legal reasoning about personal status. The Romans recognized their unusually extensive paternal power as distinctive — other peoples might have family structures, but none granted fathers such complete legal authority over children. This power extended to adult children, lasting until the father’s death, emancipation, or certain other events.
Gaius’s Institutes, preserved through a palimpsest discovered at Verona in 1816, became a primary source for understanding Roman private law. The work’s systematic treatment of persons, things, and actions influenced Justinian’s Institutes (533 AD) and through them the entire civil law tradition.
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The following examples illustrate the suus/eius distinction in the context of a court considering dismissal of a case on jurisdictional grounds without either party having raised the issue.
Part A: Interlinear Construed Text
28.16a Tribūnal suā sponte iūrisdictiōnem exāmināre coeperat.
28.16b Tribūnal (triˈbuː.nal) tribunal-NOM suā (ˈsu.aː) its-own-ABL.F.SG sponte (ˈspon.te) will-ABL iūrisdictiōnem (juːˌris.dikˈti.oː.nem) jurisdiction-ACC exāmināre (ek.saːˈmiː.naː.re) to-examine-INF coeperat (ˈkoe̯.pe.rat) had-begun-3SG.PLUPERF
28.17a Āctor suam petītiōnem in fōrum competēns prōtulerat.
28.17b Āctor (ˈaːk.tor) plaintiff-NOM suam (ˈsu.am) his-own-ACC.F.SG petītiōnem (pe.tiːˈti.oː.nem) petition-ACC in (in) into fōrum (ˈfoː.rum) forum-ACC competēns (komˈpe.teːns) competent-ACC prōtulerat (proːˈtu.le.rat) had-brought-3SG.PLUPERF
28.18a Reus eius argūmenta dē iūrisdictiōne nōn impugnāverat.
28.18b Reus (ˈre.us) defendant-NOM eius (ˈe.jus) his-GEN.SG argūmenta (ar.guːˈmen.ta) arguments-ACC dē (deː) concerning iūrisdictiōne (juː.risˈdik.ti.oː.ne) jurisdiction-ABL nōn (noːn) not impugnāverat (im.pugˈnaː.we.rat) had-challenged-3SG.PLUPERF
28.19a Iūdex tamen suīs oculīs vitium vidit.
28.19b Iūdex (ˈjuː.deks) judge-NOM tamen (ˈta.men) nevertheless suīs (ˈsu.iːs) his-own-ABL.PL oculīs (ˈo.ku.liːs) eyes-ABL vitium (ˈwi.ti.um) defect-ACC vidit (ˈwiː.dit) saw-3SG.PERF
28.20a Causae substantia suā nātūrā iūrisdictiōnem fōrī exclūdēbat.
28.20b Causae (ˈkau̯.sae̯) case-GEN substantia (sub.stanˈti.a) substance-NOM suā (ˈsu.aː) its-own-ABL.F.SG nātūrā (naːˈtuː.raː) nature-ABL iūrisdictiōnem (juː.risˌdik.tiˈoː.nem) jurisdiction-ACC fōrī (ˈfoː.riː) court-GEN exclūdēbat (eks.kluːˈdeː.bat) was-excluding-3SG.IMPERF
28.21a Neuter litigātor eōrum dēfectum cognōverat.
28.21b Neuter (ˈneu̯.ter) neither-NOM litigātor (liːˈti.gaː.tor) litigant-NOM eōrum (eˈoː.rum) their-GEN.M.PL dēfectum (deːˈfek.tum) defect-ACC cognōverat (kog.ˈnoː.we.rat) had-recognized-3SG.PLUPERF
28.22a Tribūnal suam potestātem dīmittendī suā sponte habēbat.
28.22b Tribūnal (triˈbuː.nal) tribunal-NOM suam (ˈsu.am) its-own-ACC.F.SG potestātem (po.tesˈtaː.tem) power-ACC dīmittendī (diːˌmitˈten.diː) of-dismissing-GEN suā (ˈsu.aː) its-own-ABL.F.SG sponte (ˈspon.te) will-ABL habēbat (haˈbeː.bat) had-3SG.IMPERF
28.23a Iūdex eīs mandāvit ut suās positiōnēs dē iūrisdictiōne prōpōnerent.
28.23b Iūdex (ˈjuː.deks) judge-NOM eīs (ˈe.iːs) to-them-DAT mandāvit (manˈdaː.wit) ordered-3SG.PERF ut (ut) that suās (ˈsu.aːs) their-own-ACC.F.PL positiōnēs (po.siˌtiˈoː.neːs) positions-ACC dē (deː) concerning iūrisdictiōne (juː.risˈdik.ti.oː.ne) jurisdiction-ABL prōpōnerent (proːˈpoː.ne.rent) submit-3PL.IMPERF.SUBJ
28.24a Āctor suōs advocātōs dē perīculō monuit.
28.24b Āctor (ˈaːk.tor) plaintiff-NOM suōs (ˈsu.oːs) his-own-ACC.M.PL advocātōs (ad.woˈkaː.toːs) advocates-ACC dē (deː) concerning perīculō (peˈriː.ku.loː) danger-ABL monuit (ˈmo.nu.it) warned-3SG.PERF
28.25a Reus suam respōnsiōnem sine morā parāvit.
28.25b Reus (ˈre.us) defendant-NOM suam (ˈsu.am) his-own-ACC.F.SG respōnsiōnem (res.ponˌsiˈoː.nem) response-ACC sine (ˈsi.ne) without morā (ˈmo.raː) delay-ABL parāvit (paˈraː.wit) prepared-3SG.PERF
28.26a Uterque eōrum scrīpta suīs subscrīptiōnibus mūnīvit.
28.26b Uterque (ˈu.ter.kwe) each-NOM eōrum (eˈoː.rum) of-them-GEN.M.PL scrīpta (ˈskriːp.ta) writings-ACC suīs (ˈsu.iːs) their-own-ABL.PL subscrīptiōnibus (sub.skriːpˌti.ˈoː.ni.bus) signatures-ABL mūnīvit (muːˈniː.wit) fortified-3SG.PERF
28.27a Tribūnal eōrum argūmenta perpendēns suam sententiā meditāta est.
28.27b Tribūnal (triˈbuː.nal) tribunal-NOM eōrum (eˈoː.rum) their-GEN.M.PL argūmenta (ar.guːˈmen.ta) arguments-ACC perpendēns (per.penˈdeːns) weighing-PRES.PART suam (ˈsu.am) its-own-ACC.F.SG sententiam (senˈten.ti.am) decision-ACC meditāta (me.diˈtaː.ta) deliberated-PERF.PART est (est) is-3SG
28.28a Iūdex suā auctōritāte causam sine iūrisdictiōne dīmīsit.
28.28b Iūdex (ˈjuː.deks) judge-NOM suā (ˈsu.aː) his-own-ABL.F.SG auctōritāte (au̯k.toːˈriː.taː.te) authority-ABL causam (ˈkau̯.sam) case-ACC sine (ˈsi.ne) without iūrisdictiōne (juːˌris.dikˈti.oː.ne) jurisdiction-ABL dīmīsit (diːˈmiː.sit) dismissed-3SG.PERF
28.29a Āctor eius sententiā offēnsus appellātiōnem parāre coepit.
28.29b Āctor (ˈaːk.tor) plaintiff-NOM eius (ˈe.jus) his-GEN.SG sententiam (senˈten.ti.am) decision-ACC offēnsus (ofˈfeːn.sus) aggrieved-by-NOM appellātiōnem (ap.pelˌlaː.tiˈoː.nem) appeal-ACC parāre (paˈraː.re) to-prepare-INF coepit (ˈkoe̯.pit) began-3SG.PERF
28.30a Tribūnal suā sponte agēns iūstitiae et eficientiae servīvit.
28.30b Tribūnal (triˈbuː.nal) tribunal-NOM suā (ˈsu.aː) its-own-ABL.F.SG sponte (ˈspon.te) will-ABL agēns (ˈa.geːns) acting-PRES.PART iūstitiae (juːsˈtiː.ti.ae̯) justice-DAT et (et) and eficientiae (ef.fiˌki.ˈen.ti.ae̯) efficiency-DAT servīvit (serˈwiː.wit) served-3SG.PERF
Part B: Natural Sentences
28.16 Tribūnal suā sponte iūrisdictiōnem exāmināre coeperat. “The tribunal had begun to examine jurisdiction of its own accord.”
28.17 Āctor suam petītiōnem in fōrum competēns prōtulerat. “The plaintiff had brought his own petition into the competent forum.”
28.18 Reus eius argūmenta dē iūrisdictiōne nōn impugnāverat. “The defendant had not challenged his [the plaintiff’s] arguments concerning jurisdiction.”
28.19 Iūdex tamen suīs oculīs vitium vidit. “The judge nevertheless saw the defect with his own eyes.”
28.20 Causae substantia suā nātūrā iūrisdictiōnem fōrī exclūdēbat. “The substance of the case by its own nature was excluding the court’s jurisdiction.”
28.21 Neuter litigātor eōrum dēfectum cognōverat. “Neither litigant had recognized their defect.”
28.22 Tribūnal suam potestātem dīmittendī suā sponte habēbat. “The tribunal had its own power of dismissing on its own initiative.”
28.23 Iūdex eīs mandāvit ut suās positiōnēs dē iūrisdictiōne prōpōnerent. “The judge ordered them to submit their own positions concerning jurisdiction.”
28.24 Āctor suōs advocātōs dē perīculō monuit. “The plaintiff warned his own advocates about the danger.”
28.25 Reus suam respōnsiōnem sine morā parāvit. “The defendant prepared his own response without delay.”
28.26 Uterque eōrum scrīpta suīs subscrīptiōnibus mūnīvit. “Each of them fortified their writings with their own signatures.”
28.27 Tribūnal eōrum argūmenta perpendēns suam sententiam meditāta est. “The tribunal, weighing their arguments, deliberated its own decision.”
28.28 Iūdex suā auctōritāte causam sine iūrisdictiōne dīmīsit. “The judge by his own authority dismissed the case for lack of jurisdiction.”
28.29 Āctor eius sententiā offēnsus appellātiōnem parāre coepit. “The plaintiff, aggrieved by his [the judge’s] decision, began to prepare an appeal.”
28.30 Tribūnal suā sponte agēns iūstitiae et eficientiae servīvit. “The tribunal, acting on its own initiative, served justice and efficiency.”
Part C: Latin Text Only
28.16 Tribūnal suā sponte iūrisdictiōnem exāmināre coeperat.
28.17 Āctor suam petītiōnem in fōrum competēns prōtulerat.
28.18 Reus eius argūmenta dē iūrisdictiōne nōn impugnāverat.
28.19 Iūdex tamen suīs oculīs vitium vidit.
28.20 Causae substantia suā nātūrā iūrisdictiōnem fōrī exclūdēbat.
28.21 Neuter litigātor eōrum dēfectum cognōverat.
28.22 Tribūnal suam potestātem dīmittendī suā sponte habēbat.
28.23 Iūdex eīs mandāvit ut suās positiōnēs dē iūrisdictiōne prōpōnerent.
28.24 Āctor suōs advocātōs dē perīculō monuit.
28.25 Reus suam respōnsiōnem sine morā parāvit.
28.26 Uterque eōrum scrīpta suīs subscrīptiōnibus mūnīvit.
28.27 Tribūnal eōrum argūmenta perpendēns suam sententiam meditāta est.
28.28 Iūdex suā auctōritāte causam sine iūrisdictiōne dīmīsit.
28.29 Āctor eius sententiā offēnsus appellātiōnem parāre coepit.
28.30 Tribūnal suā sponte agēns iūstitiae et eficientiae servīvit.
Part D: Grammar Notes for Genre Section
This narrative demonstrates the interplay of suus and eius in a complex legal proceeding involving multiple parties. Note particularly example 28.27, where the tribunal weighs “eōrum argūmenta” (their arguments — belonging to the litigants, not the tribunal) while deliberating “suam sententiam” (its own decision — belonging to the tribunal itself). This single sentence captures the essential distinction.
The phrase “suā sponte” appears multiple times, reinforcing its status as a fixed legal formula. The ablative feminine “suā” never changes regardless of the subject’s gender, as it agrees with the feminine noun “sponte” (from spōns, spontis).
The contrast between “suīs oculīs” (28.19 — the judge’s own eyes) and “eius sententiam” (28.29 — the judge’s decision from the plaintiff’s perspective) shows how the same person’s possessions can be expressed differently depending on grammatical subject.
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This lesson forms part of a comprehensive Latin curriculum designed for legal professionals — lawyers, judges, and notaries public — who encounter Latin terminology in their daily practice. The course follows the Latinum Institute methodology developed since 2006, emphasizing authentic legal usage and precise grammatical understanding.
The vocabulary progression follows a frequency-based system, ensuring that students encounter the most essential Latin words in a logical sequence. Each lesson introduces new vocabulary within the context of legal discourse, building competence through graduated exposure to increasingly complex constructions.
The interlinear construed text format — presenting Latin with word-by-word glossing — accelerates comprehension by making grammatical relationships immediately visible. This methodology has proven particularly effective for autodidact learners working through materials independently.
Course Index: https://latinum.substack.com/p/index
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The distinction between reflexive and non-reflexive possession (suus versus eius) represents one of the most significant differences between Latin and English. English uses the same word “his” regardless of whether possession belongs to the subject or to another person — Latin requires speakers to make this distinction explicit. For legal professionals, this precision prevents the ambiguity that can invalidate documents or obscure judicial reasoning.
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Lesson 28 Complete
✓ 30 examples demonstrating suus/eius distinction in legal contexts ✓ Complete declension of suus, sua, suum ✓ Key legal formulae: sua sponte, sui iuris, suus heres, suo nomine ✓ Gaius Institutes citation with interlinear analysis ✓ Court proceedings narrative showing practical application
Proceeding to Lesson 29...
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