verb (v)

• command against(verb.communication)

  Example:
  I forbid you to call me late at night.
  

  Synonym:
  disallow, interdict, nix, prohibit, proscribe, veto
  Antonym:
  allow, countenance, let, permit
  

  source: wordnet30
• keep from happening or arising; make impossible(verb.social)

  Example:
  My sense of tact forbids an honest answer.
  

  Synonym:
  foreclose, forestall, preclude, prevent
  

  source: wordnet30
• To command against, or contrary to; to prohibit; to interdict.(verb)

  source: webster1913
• To utter a prohibition; to prevent; to hinder.(verb)

  source: webster1913