preserver
nounUK /prɪˈzɜːvə/
US /prɪˈzɜːrvər/
A person or thing that keeps something safe so it does not get lost or broken.
The life preserver kept the swimmer safe in the water.
RELATED WORDS
OTHER MEANINGS
2. A substance or chemical added to food to keep it from spoiling.
The jam contains a natural preserver to keep it fresh.
3. A ring or jacket that helps a person float in water.
He threw a life preserver to the person in the lake.
4. A person who takes care of something, like a park or a tradition.
She is a preserver of old folk songs.