simple past tense and past participle of prevent

(transitive) To stop (an outcome); to keep from (doing something). / (intransitive, now rare) To take preventative measures. / (obsolete, transitive) To come before; to precede.

present participle and gerund of prevent

Capable of being prevented.

Something that can be prevented.

The act of preventing or hindering; obstruction of action, access, or approach; thwarting.

Preventing, hindering, or acting as an obstacle to. / Carried out to deter military aggression. / Slowing the development of an illness; prophylactic. / (obsolete) Going before; preceding.

(dated) A thing that prevents, hinders, or acts as an obstacle to. / (nonstandard) A thing that slows the development of an illness. / A contraceptive, especially a condom.

Third-person singular simple present indicative form of prevent

One who, or that which, prevents. / (nautical) An arrangement, made with ropes and blocks, that prevents the boom of a sailing boat from performing a jibe.