v. 25B6; verb FIND OUT, discover, get to know, work out, make out, fathom (out), learn, deduce, divine, discern, see, understand, comprehend; establish, determine, verify, confirm; informal figure out; Brit. informal suss (out).
ASCERTAIN
Meaning of ASCERTAIN in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012