adj. 25B6; adjective UNFAMILIAR, unaccustomed, unused; inexperienced, ignorant, uninformed, unenlightened, unconversant; informal in the dark; poetic/literary nescient.
familiar.
UNACQUAINTED
Meaning of UNACQUAINTED in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012