life·sav·er /ˈlaɪfˌsevɚ/
救命者,水難救生員,濟急的人
lifesaver
n 1: an attendant employed at a beach or pool to protect swimmers
from accidents [syn: lifeguard]
2: a life preserver in the form of a ring of buoyant material
[syn: life buoy, life belt, life ring]