co- — with, together, jointly, partner (affix)

cooperate B2

/koʊˈɑ.pəˌɹeɪt/ To work together with others toward a shared goal. M S

coordinate C1

/koʊˈɔɹ.də.nɪt/ To organize different people or activities so that they work well together. M S

coauthor C2

/ˌkoʊˈɔːθɚ/ a person who writes a book, article, or other work jointly with another author M S

coexist C2+

/ˌkoʊɪɡˈzɪst/ to exist at the same time or in the same place, especially peacefully M S