Falsify

fawls′i-fī, v.t. to forge or counterfeit: to prove untrustworthy: to break by falsehood:— pr.p. fals′ifying; pa.p. fals′ified. — adj. Fals′ifīable , capable of being falsified.— ns. Falsificā′tion , the act of making false: the giving to a thing the appearance of something which it is not; Fals′ifier , one who falsifies. [Fr.,—Low L. falsificăre —L. falsus , false, facĕre , to make.]