English to English

verb (v)

• declare invalid(verb.social)

  Example:
  The contract was annulled.
  

  Synonym:
  avoid, invalidate, nullify, quash, void
  Antonym:
  formalise, formalize, validate
  

  source: wordnet30
• cancel officially(verb.communication)

  Synonym:
  countermand, lift, overturn, repeal, rescind, reverse, revoke, vacate
  

  source: wordnet30
• To reduce to nothing; to obliterate.(verb)

  source: webster1913