life buoy

Etymology
From the way it can save someone's life by buoying them up so that they do not drown.

Noun

 * 1)  A buoyant object (most commonly torus-shaped) that is used as a life-saving device by keeping a person afloat.
 * 2)  Something that rescues one from difficulties.
 * 1)  Something that rescues one from difficulties.
 * 1)  Something that rescues one from difficulties.
 * 1)  Something that rescues one from difficulties.
 * 1)  Something that rescues one from difficulties.
 * 1)  Something that rescues one from difficulties.