verb (v)

• make false by mutilation or addition; as of a message or story(verb.communication)

  Synonym:
  distort, garble, warp
  

  source: wordnet30
• tamper, with the purpose of deception(verb.social)

  Example:
  Falsify the data.
  

  Synonym:
  cook, fake, fudge, manipulate, misrepresent, wangle
  

  source: wordnet30
• prove false(verb.cognition)

  Example:
  Falsify a claim.
  

  source: wordnet30
• falsify knowingly(verb.change)

  Antonym:
  correct, rectify, right
  

  source: wordnet30
• insert words into texts, often falsifying it thereby(verb.change)

  Synonym:
  alter, interpolate
  

  source: wordnet30
• To make false; to represent falsely.(verb)

  source: webster1913
• To tell lies; to violate the truth.(verb)

  source: webster1913