preventer
nounUK /prɪˈvɛntə/
US /prɪˈvɛntər/
A preventer is something that stops a bad thing from happening.
The seatbelt is a preventer of serious injuries in car crashes.
RELATED WORDS
OTHER MEANINGS
2. A rope or device used on a ship to keep a sail or spar from moving dangerously.
The sailor tightened the preventer to steady the boom in the strong wind.
3. A person who acts to stop something from occurring.
She was a preventer of trouble, always calming arguments before they grew.
4. In grammar, a word that expresses prevention or hindrance.
The phrase 'keep from' acts as a preventer in the sentence.
5. A substance or agent that inhibits a process, such as rust or fire.
This spray is a rust preventer for metal tools.