verb (v)

• bar temporarily; from school, office, etc.(verb.social)

  Synonym:
  suspend
  

  source: wordnet30
• prevent the occurrence of; prevent from happening(verb.social)

  Synonym:
  avert, avoid, deflect, fend off, forefend, forfend, head off, obviate, stave off, ward off
  

  source: wordnet30
• prevent from entering; keep out(verb.communication)

  Synonym:
  bar, exclude
  

  source: wordnet30
• To cut off from entrance, as if by a bar or barrier; to preclude; to hinder from approach, entry, or enjoyment; to shut out or exclude; to deny or refuse; -- with from, and sometimes with of.(verb)

  source: webster1913