Ascertain :: Ascertain (v. t.) To render (a person) certain; to cause to feel certain; to make confident; to assure; to apprise.
Ascertain :: Ascertain (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..
Ascertain :: Ascertain (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..
Certain :: Certain (a.) Fixed or stated; regular; determinate.
Certain :: Certain (a.) Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons..