lifesaver
lifesaver — noun
1. a person or thing that gets you out of a difficult or unpleasant situation by pr
a person or thing that gets you out of a difficult or unpleasant situation by providing exactly what you need at the right moment
After Cyrus lost his notes, his classmate Jisoo was a lifesaver by sharing hers.
person as lifesaver — sharing needed items
This translation app was a lifesaver when Ishaan's phone broke in a foreign country.
thing as lifesaver in a travel emergency
A spare phone charger was a lifesaver during the long power cut at Camila's hotel.
When Tamar forgot her wallet, Owen offered to pay — he was a real lifesaver.
The emergency contact that Dario saved on his phone turned out to be a lifesaver.
文法句型
be a lifesaver
[possessive] + lifesaver
用法筆記
Often used in the fixed expression 'You're a lifesaver!' when thanking someone informally for unexpected help.
常見錯誤
2. a piece of equipment, a device, or a system designed to prevent death or serious
a piece of equipment, a device, or a system designed to prevent death or serious injury when an emergency happens
The life jacket was a lifesaver during the boat accident on the lake.
lifesaver as safety equipment (life jacket)
AED machines placed in public buildings can be lifesavers during heart emergencies.
lifesaver as medical device (AED)
These smoke detectors are real lifesavers — they give you time to escape a fire.
Seat belts are simple lifesavers that prevent serious injuries in car crashes.
The emergency oxygen mask dropped down and became a lifesaver for everyone on the plane.
- safety device
more formal and technical
- life preserver
more specific — a flotation device
- death trap
something dangerously unsafe
文法句型
be a lifesaver
lifesaver + for
用法筆記
Sense 2 refers only to objects or systems — not to people. For a person who saves lives in an emergency, use sense 3 or the word rescuer.
3. someone whose job it is to watch over swimmers at a beach, swimming pool, or wat
someone whose job it is to watch over swimmers at a beach, swimming pool, or water park and to rescue anyone in danger of drowning
The lifesaver spotted a struggling swimmer and dived into the pool right away.
lifesaver as job: rescuing swimmers
Tunde works as a lifesaver at the public beach near his home every summer.
A good lifesaver must stay focused and ready to jump in at any moment.
The lifesaver blew her whistle to warn the children about the dangerous current.
Élise trained for months and finally became a certified lifesaver at the water park.
- lifeguard
the dominant term in American English; also common globally
- beach patrol
refers to the team or organization, not the individual
文法句型
work as a lifesaver
certified lifesaver
用法筆記
In American English, this person is nearly always called a lifeguard. Lifesaver in this sense is more common in British, Australian, and New Zealand English.