FALSIFY

verb (-fied; -fying) Etymology: Middle English falsifien, from Middle French falsifier, from Medieval Latin falsificare, from Latin falsus Date: 15th century transitive verb to prove or declare false ; disprove , to make false: as, to make false by mutilation or addition , to represent falsely ; misrepresent , to prove unsound by experience, intransitive verb to tell lies ; lie , falsifiability noun falsifiable adjective falsification noun falsifier noun