verb (v)

• establish or strengthen as with new evidence or facts(verb.cognition)

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

  source: wordnet30
• to declare or affirm solemnly and formally as true(verb.communication)

  Synonym:
  assert, aver, avow, swan, swear, verify
  

  source: wordnet30
• say yes to(verb.communication)

  source: wordnet30
• to assert or confirm, as a judgment, decree, or order, brought before an appellate court for review.(verb)

  source: webster1913
• To declare or assert positively.(verb)

  source: webster1913