WordWeb Online

1. Make false by mutilation or addition; as of a message or story
   "They planned to falsify the message";
   - distort, garble, warp
    
2. Tamper, with the purpose of deception
   "falsify the data";
   - fudge, manipulate, fake, cook [informal], wangle [informal], misrepresent, spoof [informal]
    
3. Prove false
   "Falsify a claim"
    
4. Falsify knowingly
   "She falsified the records"
    
5. Insert words into texts, often falsifying it thereby
   - interpolate, alter

Derived forms: falsifies, falsifying, falsified

Type of: belie, change by reversal, cheat, chisel [informal], confute, disprove, edit, misrepresent, redact, reverse, turn

Antonym: correct

Encyclopedia: Falsify