Etymologically

commilitium

Etymology and origin of the Latin word commilitium

Confidence
Established
Formation
Derivation
First attested
43 BC–18 AD, Ovid
Ultimate origin
Latin mīles
Etymology tree
inherited borrowed derived
Latin miles
Latin commilitium
From the same root
Latin militaris ← miles
Latin militarius ← miles

Pronunciation

  • Classical: [kɔm.miːˈlɪ.ti.ũː][1]
  • Ecclesiastical: [kom.miˈlit.t͡si.um][1]

Forms

commīlitium n (genitive commīlitiī or commīlitī); second declension[1]

Etymology

It is from Latin con- (“together”) + mīles (“soldier”) + -ium,[1][2] or, as the OLD puts it, from commīles (“fellow soldier”) with the suffix ⟨-ium⟩.[3][4] De Vaan calls the first element of mīles unclear, though he finds a link with mīlia (“thousands”) tempting.[5]

Earliest recorded meaning

Köbler dates it from Ovid,[6] who uses it of the fellowship of poets;[3][7] Lewis and Short think it probably not used before the Augustan period.[7]

Semantic evolution

Its proper sense was comradeship in war, association in military service: it is used by Velleius Paterculus, Quintilian, Tacitus, Florus, Justin and Pliny the Younger.[7] Quintilian says of someone that he had served with Thessalians, and Tacitus has the Chauci taken into the alliance in arms.[8][2]

The transferred sense of fellowship in general is rare:[7] besides Ovid's sacred bond of poets, Manilius has it, and Apuleius speaks of a friendship begun in a fellowship of studies.[3][2] In British medieval Latin William of Malmesbury used it collectively for a body of knights, a retinue.[9]

Timeline

  • 43 BC–18 AD – Ovid uses it of the fellowship of poets.[3][6]
  • c. 20 BC–30 AD – Velleius Paterculus uses it of comradeship in war.[7][6]
  • c. 35–95/96 AD – Quintilian uses it of serving alongside Thessalians.[8][6]
  • 98–115 AD – Tacitus uses it of taking the Chauci into alliance.[2][6]
  • c. 125–175 AD – Apuleius speaks of a fellowship of studies.[3][6]

Meanings

Noun

  1. Association in military service, comradeship in war.[3][7]
  2. (transferred) Fellowship in other activities.[3][7]
  3. (Medieval Latin) Knighthood as a body, a retinue of knights.[9]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  3. ^ a b c d e f g Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ Bianchi, Rossella; Lelli, Olga (2014), VOLI: Vocabolario di latino, Florence: Le Monnier
  5. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  6. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  7. ^ a b c d e f g Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  8. ^ a b Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  9. ^ 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
Cite this entry

“Commilitium.” Etymologically, 20 Oct. 2026, etymologically.com/la/commilitium. Accessed 22 Oct. 2026.

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