lifeguard

A lifeguard is a person whose job involves watching over swimmers and rescuing them if they're in trouble. You have to do more than just twirl your whistle to be a lifeguard; you'd better be a very good swimmer as well.

At the beach and the pool, lifeguards wear swimsuits and carry whistles for catching the attention of rule-breakers, like kids who are dunking each other or jumping into the shallow end. Lifeguards sit perched on high chairs, ready to swim to the aid of someone who's drowning or injured. In the seventeenth century, a lifeguard was a "solider's bodyguard," and by the late 1800s the meaning changed to "watcher of bathers."

Definitions of lifeguard
1

n an attendant employed at a beach or pool to protect swimmers from accidents

Synonyms:
lifesaver
Type of:
attendant, attender, tender
someone who waits on or tends to or attends to the needs of another

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