Origin: 1250–1300; ME
conversa(
u)
nt < L
conversant- (s. of
conversāns), prp. of
conversārī to associate with.
See converse 1 , -ant 
Related forms: con⋅ver⋅sance, con⋅ver⋅san⋅cy, noun
con⋅ver⋅sant⋅ly, adverb
Synonyms:
1. versed, learned, skilled, practiced, well-informed, proficient.