means A person who rescues someone or something from danger, harm, or ruin — and in religious use, capitalized, the one who delivers humanity from sin.

from From Latin 'salvator,' "one who saves," built on 'salvare' (to save) and ultimately 'salvus' (safe, whole, healthy — also the root of 'salvation,' 'salve,' and 'safe'). It traveled into English through Old French 'sauveour' in the medieval period, arriving heavily freighted with Christian theology as a title for Christ before broadening to any rescuer.