From Middle English salve, from Old English sealf, from Proto-West Germanic *salbu, from Proto-Germanic *salbō, from Proto-Indo-European, from *selp-.
Cognate with Middle Low German salve (Danish salve, Dutch zalf), Old High German salba (German Salbe), Gothic 𐍃𐌰𐌻𐌱𐍉𐌽𐍃, Albanian gjalpë, Sanskrit सर्पिस्, Ancient Greek ἔλπος.
From Old English sealfian, from Proto-West Germanic *salbōn, from Proto-Germanic *salbōną, from *salbō (whence salve).