Co
/koΚ/noun
A prefix meaning 'with,' 'together,' or 'jointly.'
Did you know?The prefix co- comes from Latin com- / co- 'with, together,' and it appears in countless English words that originally meant people or things acting as one.
Etymological Timeline
Proto-Indo-European
PIE
*kom
βbeside, near, withβ
Latin
Latin
com- / co-
βwith, togetherβ
Old French
Old French
co-
βas a prefix meaning with, togetherβ
Middle English
English
co-
βprefix used in learned borrowings from French and Latinβ
Modern English
English
co-
βa productive prefix meaning with, jointly, or in associationβ