proof
noun
°Any effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.
°The degree of evidence which convinces the mind of any truth or fact, and produces belief; a test by facts or arguments which induce, or tend to induce, certainty of the judgment; conclusive evidence; demonstration.
adjective
°Used in proving or testing; as, a proof load, or proof charge.
°Firm or successful in resisting; as, proof against harm; waterproof; bombproof.
verb
°To proofread.
°To make resistant, especially to water.
synonyms: testimony, evidence, reason, argument more» , trial, demonstration