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co-

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co-¹

  • /ˈkəʊ-/ UK
  • /ˌkəʊ-/ UK
  • /ˈkoʊ-/ Canada, US
  • /ˌkoʊ-/ Canada, US
  • /koː/ South Asia
  • /ko/ South Asia
  • /ˈkoʊ-/ Inland Northern American
  • [ˈkʌo-] Inland Northern American
  • /ˌkoʊ-/ Inland Northern American
  • [ˌkʌo-] Inland Northern American
  • /ˈkəʉ-/ Australia
  • /ˌkəʉ-/ Australia
  • /ˈkɐʉ-/ New Zealand
  • /ˌkɐʉ-/ New Zealand
  • /kɒ-/ unstressed

Where it comes from

Learned borrowing from Latin co-, from con-, from Proto-Italic *kom-, from *kom, from Proto-Indo-European *ḱóm, possibly from *ḱe.

prefix

  1. morpheme Jointly: the root verb is done in coordination between multiple actors or entities coadoption
  2. morpheme Along with: the root verb is done along with or in addition to others. coassemble
  3. morpheme Mutually: the root is done in a way that is reciprocal and bidirectional. coadherence
  4. morpheme Simultaneously, done or able to do at the same time. cobirthing
  5. morpheme Spatially located or positioned together, co-located. cocirculate
  6. morpheme In conjunction: the root needs another entity to take effect, or there is a one-way interaction between them. coantioxidant
  7. morpheme Moving or oriented in the same direction; co-directional. coflowing
  8. morpheme Gender-mixed; having men and women together for the root activity or location. co-corrections
  9. morpheme Having commonality, similarity with respect to the root. coaxial
  10. morpheme Coequal, equal in rank. coadministrator
  11. morpheme Indicating a family relationship that indicates a common rank made through three degrees of separation, the middle of which is by marriage. co-sister
  12. morpheme Equally, equal with respect to the root. codominant
  13. morpheme During the same time period as the root. coseasonal
  14. morpheme The difference from some fixed quantity. coaltitude
  15. morpheme Dual, relating to the opposite category. cocategory
  16. morpheme Having multiple targets or effects; the root affects or involves multiple subjects. coaccused
  17. morpheme Secondary or auxiliary in rank or priority. copilot
  18. morpheme Referring to coenzymes. coglucosidase
  19. morpheme Referring to copolymers. codimer
  20. morpheme Deriving from multiple sources. copolymer

Similar: con-, com-, col-, cor-, syn-, syl-, sym-, inter-

co-²

Where it comes from

Initialism of class of.

prefix

  1. abbreviation, informal, initialism, morpheme Initialism of class of; prefixed to a full or abbreviated year number. Class of 2025 (co25) Graduation Information

Thesaurus

prefix

Similar: con-, com-, col-, cor-, syn-, syl-, sym-, inter-

Translations

Every language

prefix together, mutually, jointly

Españolco-
हिन्दीसम्- sam-, सं- sã-, हम- ham-
Portuguêsco-
Françaisco-
Deutschko-, mit-
Italianoco-
Русскийсо- so-, ко- ko-, взаимо- vzaimo-

Talk about this word

Cite this
MLA

"co-." Wiktionary, via Micwyn, micwyn.com/word/co-. Accessed 6 Nov. 2026.

APA

co-. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/co-

Chicago

"co-." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/co-.

BibTeX
@misc{co_2026,
  title = {co-},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/co-},
  urldate = {2026-11-06}
}