Synonyms: forefend, forfend, fend off, stave off, avert, avoid, obviate, debar, deflect, ward off, head off
Definition: prevent the occurrence of; prevent from happening
Usage: Let's avoid a confrontation; head off a confrontation; avert a strike
Similar words: forbid, foreclose, forestall, preclude, prevent
Definition: keep from happening or arising; make impossible
Usage: My sense of tact forbids an honest answer; Your role in the projects precludes your involvement in the competitive project