ascertaining

verb

Find (something) out for certain; make sure of.

SYNONYMS

appreciatebecome aware ofcome to knowcomprehendconfirmdecidededucedeterminediagnosedig outdig updiscerndiscoverdivineestablishfathomfathom outferret outfind outfixget to knowgraspidentifyintuitlearnmake certain ofmake outperceivepin downrealizerecognizeregisterseesettletake inunderstandverifywork out