WordWeb Online

1. Made impossible
   - preclusive

1. Get rid of something
   - rid of, eliminate
    
2. Prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off
   - debar, forefend, forfend, deflect, avert, head off, stave off, fend off, avoid, ward off

See also: preventative, preventive

Type of: forbid, foreclose, forestall, preclude, prevent

Antonym: take