Etymologically

perduellio

Etymology and origin of the Latin word perduellio

Confidence
Established
Formation
Derivation
First attested
1st century BC, Valerius Antias
Ultimate origin
Latin perduellis
Etymology tree
inherited borrowed derived
Latin duellum
English duel
Latin perduellis
Latin perduellio

Forms

perduelliō f (genitive perduelliōnis); third declension[1]

Etymology

It is formed from Latin perduellis (“public enemy”) + -iō.[2][1][3] The base is made of per- and duellum, the old form of bellum (“war”),[3][4] and de Vaan reports Meiser's view that legal language kept the ⟨du⟩ in it.[4]

The grammarian Priscian already derived it from duellum, the ancients' word for bellum;[3] Charisius took the prefix as an intensive, so that a perduellis was more than an enemy.[3]

Earliest recorded meaning

De Vaan's first author is the annalist Valerius Antias,[4] in whose history a tribune of the plebs, Licinius, fixes a day for a man's trial for it.[3] The TLL also cites it from the old royal law that Livy quotes, under which two judges try Horatius for it.[3]

Semantic evolution

It was a term of Roman criminal law, the gravest hostile act of a citizen against his own state,[2][3] such as an attack on the state, its institutions or its head, an alliance with a foreign enemy, or desertion.[5][6] Cicero spoke for Rabirius, who was charged with it,[3][7] and Livy reports cases from early Rome, among them a tribune's charge against Gnaeus Fulvius for losing an army through rashness.[3][5] After Livy it appears mostly in writers who explain the institution or recount old cases.[3] In the Digest, Ulpian says that a man accused of it acted with hostile intent against the state or the emperor.[5][3]

By metonymy the plural could mean enemies: the Rhetorica ad Herennium quotes perduelliones as an example of bombast,[6][7] and the glossary of Placidus explains the word as rebellions.[6] In British Medieval Latin it is treason, as when William of Malmesbury calls Penda, king of the Mercians, a seedbed of treasons, and Alexander Neckam uses it for the long struggle between reason and the senses.[8]

Timeline

  • 1st century BC – Valerius Antias uses it of a tribune's charge of treason.[3][9]
  • 81–43 BC – Cicero defends Rabirius on this charge.[3][7][9]
  • 59 BC–17 AD – Livy reports early trials for it, among them that of Horatius.[3][5][9]

Meanings

Noun

  1. (law) high treason, a hostile act against one's own country.[2][5][3]
  2. (by metonymy, plural) Public enemies.[6][7]
  3. (Medieval Latin) A struggle, battle.[8]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f g h i j k l m n o Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c d e Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b c d Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  7. ^ a b c d Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  8. ^ a b Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
  9. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Perduellio.” Etymologically, 25 Oct. 2026, etymologically.com/la/perduellio. Accessed 25 Oct. 2026.

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