falsifier

noun falsified, falsifying

1. to make false; specif.,
   1. to give an untrue or misleading account of; misrepresent
   2. to alter (a record, etc.) fraudulently
2. to prove or show to be untrue or unfounded: to falsify their hopes

Origin: ME falsifien < OFr falsifier < ML falsificare < L falsificus, that acts falsely < falsus, false + facere, to make, do

intransitive verb