en connaître un rayon

== French == === Etymology === Literally, “to know a bookshelf (about it)”. === Pronunciation === IPA(key): /ɑ̃ kɔ.nɛ.tʁ‿œ̃ ʁɛ.jɔ̃/ ~ /ɑ̃ kɔ.ne.tʁ‿œ̃ ʁe.jɔ̃/ === Verb === en connaître un rayon (informal) to know a fair bit about something, to know a thing or two about something, to know one's stuff, to know one's onions Synonym: s'y connaître ==== Conjugation ==== see connaître