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co-

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Etymology and origin of the Latin word co-

Confidence
Established
Ultimate origin
Proto-Indo-European *ḱom

Pronunciation

  • Classical: [kɔ][1]
  • Ecclesiastical: [ko][1]

Forms

co- [1]

Etymology

It is from Latin com-, in the form the prefix takes before vowels and ⟨h⟩, where its /m/ was lost as at the end of a word.[2][3] The vowel may contract with the next one, as in cōgō from co- and agō.[3]

Meanings

Prefix

  1. together, with: coeō, cohors.[3][4]
  2. Completely: coerceō, cooperiō.[3]

Word family

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  3. ^ a b c d Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de

Derived terms

Descendants

Cite this entry

“Co-.” Etymologically, 23 Oct. 2026, etymologically.com/la/co-. Accessed 23 Oct. 2026.

Last edited on . ·