also coworker, "one who works with another," 1640s, from co- + worker (n.). The verb co-work is attested from 1610s.
Entries linking to co-worker
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).
worker n.
mid-14c., "laborer, toiler, performer, doer," agent noun from work (v.). As a type of bee, 1747. As "one employed for a wage," 1848. Old English had wyrcend "worker, laborer."