Etymology and origin of the Latin word complex
- Confidence
- Established
- Formation
- Derivation
- First attested
- 297–310 Arnobius More words from the 3rd century
- Ultimate origin
- Latin plicō
Etymology tree
From the same root
Forms
complex (genitive complicis); third-declension one-termination adjective[1]
Etymology
It is from Latin con- + plicō (“to fold”).[1][2] The TLL compares complicō (“to fold together”) and the adjectives simplex and multiplex.[3]
Earliest recorded meaning
Its earliest record is in Arnobius (297–310 AD),[2] who reports Varro's view of gods dwelling in the innermost recesses of heaven, called consentes et complices, “agreeing and associated”.[3][4]
Semantic evolution
It is a Late Latin word,[4] used as an adjective, “closely connected with, sharing in”, often with a genitive, by Christian writers and in the laws,[4][5] and as a noun for a partner or colleague; the glosses explain it as socii and conscii.[3]
In Medieval Latin it named a copartner, a follower or partisan, and above all an accomplice.[6][7] Old French took it as complice, “a confederate, partner”, without a criminal sense;[8] English borrowed that as complice in the early 15th century, and accomplice (1580s) is an unetymological extension of it.[8]
Timeline
- 297–310 AD – Arnobius uses it of the gods called consentes et complices.[3][2]
- c. 340–397 AD – Ambrose uses it with a genitive.[4][2]
- 348/49–c. 413 AD – Prudentius uses it in the Hamartigenia.[4][2]
- early 8th century AD – Bede writes that Eve made her husband an accomplice in her transgression.[7][2]
- early 15th century – English borrows complice through Old French.[8]
Meanings
Adjective
- Closely connected (with someone), confederate; sharing in (with genitive).[4][5][9]
- Of gods: dii consentes et complices, gods agreeing and associated together.[4]
Noun
- A partner, associate, colleague.[3][2]
- (Late Latin) An accomplice, a partner in wrongdoing.[9][6][7]
- (Medieval Latin) A copartner in business.[6]
- (Medieval Latin) A partisan, follower, comrade.[6]
Related words
- complicō
- simplex
- English accomplice
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c d e Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ a b c d e f g Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
- ^ a b c d Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
- ^ a b c 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
- ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry
“Complex.” Etymologically, 13 Nov. 2026, etymologically.com/la/complex. Accessed 14 Nov. 2026.
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