25B6; adjective FAMILIAR, acquainted, conversant, at home, up to date, au courant, in touch; abreast, apprised, in the know, well informed, knowledgeable, well versed, enlightened; informal clued up, wise to, hip to.
AU FAIT
Meaning of AU FAIT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012