What is the Latin word for co-operation?

The usual Latin words for “co-operation” are opus, auxilium, adiuvō; also adiūtor. The right choice depends on the sense; see the distinctions below.

English → Latin

“co-operation” in Latin

opuswork, labor, accomplishment; workmanship, artwork, work (of art, literature, etc.); need, necessity auxiliumhelp, aid, assistance, relief; antidote, remedy adiuvōto help, assist; to be useful; to cheer adiūtorhelper, assistant; deputy

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

co-operation

opera: auxilium. With anybody’s co-operation, alicujus opera or auxilio; aliquo juvante, or adjuvante, or adjutore: to promise anybody one’s faithful co-operation in anything, polliceri alicui nec infidelem nec segnem operam in aliqua re. Vid: also, PARTICIPATION.

Quick answer

What is the Latin word for co-operation?: The usual Latin words for “co-operation” are opus, auxilium, adiuvō; also adiūtor. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.