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Definition of prevent:

  1. To stop or hinder, as the approach of a person, or the performance of something; to impede; to obstruct; in old usage, to go before; to anticipate.


keep on, stay, foil, halt, proscribe, forestall, save, head off, nix, nip in the bud, limit, disturb, obstruct, hold open, keep open, interrupt, embarrass, resist, arrest, debar, keep back, hold off, knock something on the head, preclude, repress, allow, keep from happening, hold back, interdict, avoid, thwart, counter, celebrate, close out, stave off, foresee, impede, help, keep from, veto, squash, countercheck, forestall, stave off, retard, stay fresh, circumvent, clog, forfend, hold on, fend off, balk, go on, obviate, forbid, foreclose, stop from, rule out, anticipate, turn aside, preclude, observe, silence, get in the way of something, obviate, keep, encumber, intercept, override, draw off, stop, ward off, counteract, obviate, put a stop to, nip in the bud, Hinder, go along, baffle, continue, delay, sustain, oppose, frustrate, proceed, hamper.

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