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"
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"
the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment
possession of the qualities (especially mental qualities) required to do something or get something done; "danger heightened his powers of discrimination"