"Lifeblood" Natural Recordings by Native Speakers
Lifeblood is a noun that refers to something that is essential or vital to the success, prosperity, or well-being of a particular thing, organization, or system. It is often used to describe something that is crucial or fundamental to the functioning or survival of something else.
A lifebelt is a flotation device designed to keep a person afloat in water, typically worn around the chest or thrown to someone in distress.