12 letters · 26 points in Scrabble
noun remedy that prevents or slows the course of an illness or disease
noun contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
adjective capable of preventing conception or impregnation
originFrom Latin prophylacticus, from Ancient Greek προφυλακτικός (prophulaktikós, “prophylactic”).
Etymology from Wiktionary, CC BY-SA 3.0