prevent (
http://definr.com/prevent)
v 1: keep from happening of arising; have the effect of
preventing; "My sense of tact forbids an honest answer"
[syn:
forestall,
foreclose,
preclude,
forbid]
2: 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" [syn:
keep] [ant:
let]