1. (verb) prevent, forestall, foreclose, preclude, forbid
keep from happening or arising; make impossible
Synonyms: proscribe, rule out, counter, interdict, keep, veto, preclude, forestall, prevent, prohibit, foreclose, forbid, nix, anticipate, foresee, close out, disallow
Antonyms: allow, permit, let
2. (verb) prevent, keep
stop (someone or something) from doing something or being in a certain state
Synonyms: go along, keep on, celebrate, forestall, go on, keep, restrain, hold back, save, hold, hold on, prevent, foreclose, retain, forbid, keep back, proceed, maintain, keep open, observe, hold open, preserve, sustain, continue, stay fresh, preclude
Antonyms: permit, let, allow
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Synonyms and Antonyms of prevent 
