falsify (v.)Related entries & more
mid-15c., falsifien, "to prove false," from Old French falsifier "to falsify, counterfeit" (15c.), from Late Latin falsificare "make false, corrupt," from Latin falsus "erroneous, mistaken" (see false). Meaning "to make false" is from c. 1500. Earlier verb was simply falsen (c. 1200). Related: Falsified; falsifying.