Etymologically

Etymology and origin of the Latin word collusio

Confidence
Established
Formation
Derivation
First attested
81–43 BC Cicero, In Verrem
Ultimate origin
Latin collūdō
Etymology tree
inherited borrowed derived
Latin lūdō
Latin collūdō
English collude
Latin collūsiō
English collusion
From the same root
Latin allūdō ← lūdō
Latin dēlūdō ← lūdō
Latin ēlūdō ← lūdō
Latin illūdō ← lūdō
Latin lūdibundus ← lūdō
Latin lūdus ← lūdō
Latin lūsor ← lūdō
Latin lūsōrius ← lūdō
Latin lusus ← lūdō
Latin prōlūdō ← lūdō
Latin collūsor ← collūdō

Pronunciation

  • Classical: [kɔlˈluː.si.oː][1]
  • Ecclesiastical: [kolˈluː.s̬i.o][1]

Forms

collūsiō f (genitive collūsiōnis); third declension[1] It was also spelled conlūsiō.[2][3]

Etymology

It is from Latin collūdō + -tiō, a noun of action from the verb meaning “to play together; to act in collusion”.[2][1][4] The verb is formed from con- and lūdō (“to play”),[5] which de Vaan traces to Proto-Italic *loid-e/o- and Proto-Indo-European *loid- (“to let go frequently, play”).[6]

Earliest recorded meaning

Its first use is in Cicero's speeches against Verres, of the secret understanding between Verres' companions and the tax collectors.[2][7]

Semantic evolution

The TLL notes that Cicero and Apuleius use it once each, the elder Seneca twice, and the jurists very often.[4] It always meant a secret, deceptive understanding: between a girl's father and her abductor in Seneca's declamations, between husband and wife in Apuleius,[2][3] and between parties to a lawsuit in the Digest.[2][8]

Medieval writers kept the legal sense and also used it literally, of playing or joking together.[9] English borrowed it as collusion in the late 14th century, through Old French and directly from Latin.[5]

Timeline

  • 81–43 BC – Cicero uses it of a secret understanding with the tax collectors.[2][7]
  • c. 125–175 AD – Apuleius uses it of collusion between husband and wife.[2][7]
  • before 223 AD – Ulpian uses it of collusion in a trial for adultery.[2][7]
  • late 14th century – English borrows it as collusion.[5]

Meanings

Noun

  1. A secret, deceptive understanding; collusion.[2][3]
  2. (Medieval Latin) Playing together, banter.[9]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  5. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  7. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  8. ^ Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  9. ^ a b Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften

Borrowed into

Cite this entry

“Collusio.” Etymologically, 7 Nov. 2026, etymologically.com/la/collusio. Accessed 7 Nov. 2026.

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