Synonyms for prevent

Verb

1. prevent, forestall, foreclose, preclude, forbid

usage: keep from happening or arising; have the effect of preventing; "My sense of tact forbids an honest answer"

2. prevent, keep

usage: prevent from doing something or being in a certain state; "We must prevent the cancer from spreading"; "His snoring kept me from falling asleep"; "Keep the child from eating the marbles"