Verb head off has 1 sense
  1. debar, obviate, deflect, avert, head off, stave off, fend off, avoid, ward off - prevent the occurrence of; prevent from happening; "Let's avoid a confrontation"; "head off a confrontation"; "avert a strike"
    --1 is one way to prevent, forestall, foreclose, preclude, forbid
    Sample sentences:
    Somebody ----s something
    Something ----s something
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