Co- | Meaning Of Prefix Co- By Etymonline

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Origin and history of co-

co-

in Latin, the form of com- "together, with" in compounds with stems beginning in vowels, h-, and gn-; see com-. Taken in English from 17c. as a living prefix meaning "together, mutually, in common," and used promiscuously with native words (co-worker) and Latin-derived words not beginning with vowels (codependent), including some already having it (co-conspirator).

Entries linking to co-

cache(n.)

1797, "hiding place," from French Canadian trappers' slang, "hiding place for stores and provisions" (1660s), a back-formation from French cacher "to hide, conceal" (13c., Old French cachier), from Vulgar Latin *coacticare "store up, collect, compress," frequentative of Latin coactare "constrain," from coactus, past participle of cogere "to collect," literally "to drive together," from com- "together" (see co-) + agere "to set in motion, drive; to do, perform" (from PIE root *ag- "to drive, draw out or forth, move"). The sense was extended by 1830s to "anything stored in a hiding place."

co-act(v.)

"to act together," c. 1600, from co- + act (v.). Related: Co-action; co-active; co-actor.

• coadaptation
• coadjacent
• coalesce
• coarticulation
• co-author
• coaxial
• co-belligerent
• co-defendant
• co-dependent
• codominant
• co-education
• coefficient
• coequal
• coerce
• coessential
• coeternal
• coevolution
• coexist
• See All Related Words (62)

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coalesce1540s, "grow together, unite by growing into one body," from Latin coalescere "unite, grow together, become one in growth," from assimilated form of com- "together" (see co-) + alescere "be nourished," hence, "increase, grow up," inchoative of alere "to suckle, nourish," from PIEcoefficientalso co-efficient, c. 1600, "that which unites in action with something else to produce a given effect," from co- + efficient. Probably influenced by Modern Latin coefficiens, which was used in mathematics in 16c., introduced by French mathematician François Viète (1540-1603). Ascoercemid-15c., cohercen, "restrain or constrain by force of law or authority," from Old French cohercier, from Latin coercere "to control, restrain, shut up together," from assimilated form of com- "together" (see co-) + arcere "to enclose, confine, contain, ward off," from PIE *ark- coordinatealso co-ordinate, 1660s, "to place in the same rank," from Latin coordinare "to set in order, arrange," from co- "with, together...coordinationalso co-ordination, c. 1600, "orderly combination," from French coordination (14c.) or directly from Medieval Latin coordinationem...(nominative coordinatio), noun of action from past-participle stem of Latin coordinare "to set in order, arrange," from co...cooptationalso co-optation, 1530s, "choice, selection, mutual choice, election to fill a vacancy" on a committee, board, or society...cooperatealso co-operate, "to act or operate jointly with another or others to the same end," c. 1600, from Late Latin cooperatus,...cemetery"burial ground, place set aside for burial of the dead," late 14c., cimiterie, from Old French cimetiere "graveyard" (12c.), from Medieval Latin cemeterium, Late Latin coemeterium, from Greek koimeterion "sleeping place, dormitory," from koiman "to put to sleep," keimai "I lie doeconomy1530s, "household management," from Latin oeconomia (source of French économie, Spanish economia, German Ökonomie, etc.), from Greek oikonomia "household management, thrift," from oikonomos "manager, steward," from oikos "house, abode, dwelling" (cognate with Latin vicus "districconnoisseur1714, "a critical judge of any art, one well-acquainted with any of the fine arts and thus competent to pass judgment on its products," from French connoisseur (Modern French connaiseur), from Old French conoisseor "an expert, a judge, one well-versed," from conoistre "to know,"

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‘cite’Page URL:https://www.etymonline.com/word/co-CopyHTML Link:<a href="https://www.etymonline.com/word/co-">Etymology of co- by etymonline</a>CopyAPA Style:Harper, D. (n.d.). Etymology of co-. Online Etymology Dictionary. Retrieved December 24, 2025, from https://www.etymonline.com/word/co-CopyChicago Style:Harper Douglas, "Etymology of co-," Online Etymology Dictionary, accessed December 24, 2025, https://www.etymonline.com/word/co-.CopyMLA Style:Harper, Douglas. "Etymology of co-." Online Etymology Dictionary, https://www.etymonline.com/word/co-. Accessed 24 December, 2025.CopyIEEE Style:D. Harper. "Etymology of co-." Online Etymology Dictionary. https://www.etymonline.com/word/co- (accessed December 24, 2025).CopyRemove AdsAdvertisement

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TrendingDictionary entries near co-

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