lifesaver
noun/ˈlaɪfseɪvə(r)/
/ˈlaɪfseɪvər/
- a thing that helps somebody in a difficult situation; something that saves somebody’s life
- The new drug is a potential lifesaver.
- (also surf lifesaver)(Australian English, New Zealand English)(also lifeguard British and North American English)a person who is employed at a beach or a swimming pool to rescue people who are in danger in the water
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lifesaver