lifesaver

[lahyf-sey-ver]

noun

a person who rescues another from danger of death, especially from drowning.
a person or thing that saves a person, as from a difficult situation or critical moment: That money was a lifesaver.
Chiefly British. a lifeguard.

Origin of lifesaver

First recorded in 1880–85; life + saver
Related formslife·sav·ing, adjective, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019