"forestalls" in the verb sense
1. prevent, forestall, foreclose, preclude, forbid
keep from happening or arising make impossible
"My sense of tact forbids an honest answer"
"Your role in the projects precludes your involvement in the competitive project"
2. anticipate, foresee, forestall, counter
act in advance of deal with ahead of time
Source: WordNet® (An amazing lexical database of English)
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