verb (v)

• be in contradiction with(verb.stative)

  Synonym:
  belie, negate
  

  source: wordnet30
• deny the truth of(verb.communication)

  Synonym:
  contravene, negate
  

  source: wordnet30
• be resistant to(verb.communication)

  Synonym:
  controvert, oppose
  

  source: wordnet30
• prove negative; show to be false(verb.cognition)

  Synonym:
  negate
  Antonym:
  affirm, confirm, corroborate, substantiate, support, sustain
  

  source: wordnet30
• To assert the contrary of; to oppose in words; to take issue with; to gainsay; to deny the truth of, as of a statement or a speaker; to impugn.(verb)

  source: webster1913
• To oppose in words; to gainsay; to deny, or assert the contrary of, something.(verb)

  source: webster1913