Meaning

adjective free from danger or the risk of harm

noun strongbox where valuables can be safely kept

adjective (of an undertaking) secure from risk

originFrom Middle English sauf, safe, saf, saaf, from Old French sauf, saulf, salf (“safe”), from Latin salvus (“whole, safe”), from Proto-Italic *salwos, from Proto-Indo-European *solh₂- (“whole, every”). Displaced native Old English sicor (“secure, sure”).

Etymology from Wiktionary, CC BY-SA 3.0