life saver

Someone or something that provides crucial help in a difficult situation. The term is almost always applied to situations that are not literally life-threatening. You're a real life-saver for coming over and fixing my flat tire. The knife I brought on the camping trip turned out to be a life saver when we realized we had forgotten a can opener.

Common Names:

Name	Pronounced	Usage
Gaultier	-	French
Iahel	-	Biblical Latin
Haim	-	Hebrew
Antigone	an-TIG-ə-nee (English)	Greek Mythology
Shivali	-	Hinduism, Indian, Hindi
Laird	-	English (Rare)