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Verb: preclude  pri'klood
  1. Keep from happening or arising; make impossible
    "Your role in the projects precludes your involvement in the competitive project";
    - prevent, forestall, foreclose, forbid
  2. Make impossible, especially beforehand
    - rule out, close out

Derived forms: precluded, precludes, precluding

Type of: eliminate, obviate, rid of

Encyclopedia: Preclude