1. (v. t.) To render (a person) certain; to cause to feel certain; to make confident; to assure; to apprise.

2. (v. t.) To make (a thing) certain to the mind; to free from obscurity, doubt, or change; to make sure of; to fix; to determine.

3. (v. t.) To find out or learn for a certainty, by trial, examination, or experiment; to get to know; as, to ascertain the weight of a commodity, or the purity of a metal.

afford proof of appraise ask assure be informed become acquainted with bring home to broaden the mind catch on certify cinch clear up clinch consider contemplate cram the mind decide demonstrate determine discover dismiss all doubt ensure establish find find out find out about fix follow follow from gain knowledge get get at get hold of have a case hear hold good hold water inquire inspect insure interrogate learn learn about load the mind make a decision make certain make good make no doubt make no mistake make out make sure make sure of nail down observe pick up information prove prove to be prove true query question reassure remove all doubt resolve see see that see to it set at rest settle settle the matter show sort out study survey tumble unearth view weigh