|Origin:||, past participle of praevenire 'to come before'|
pre‧vent S2 W1 [transitive]
The rules are intended to prevent accidents.
prevent somebody/something (from) doing something
His back injury may prevent him from playing in tomorrow's game.
We were prevented from entering the site.
Wrap small ornaments in paper to prevent them being damaged.
Every one of these deaths is preventable.