falsify

verb7

1. •
   To alter so as to make false; especially when done with intent to deceive.

   • The Irish bards use to forge and falsify everything as they list, to please or displease any man. — 1596
2. •
   To misrepresent.
3. •
   To counterfeit; to forge.
4. •
   To prove to be false.

   • By how much better than my word I am, / By so much shall I falsify men's hope. — 1597
5. •
   To show (an item of charge inserted in an account) to be wrong.

   • It will allow the account to stand, with liberty to the plaintiff to surcharge and falsify it — 1833
6. •
   (no longer used) To violate; to break by falsehood.

   • he would not falsify his promise to Philanax — 1587
7. •
   (no longer used) To baffle or escape.

   • For disputants (as swordsmen use to fence / With blunted foyles) engage with blunted sense; / And as th' are wont to falsify a blow, / Use nothing else to pass upon a foe […] — 1680