9 letters · 14 points in Scrabble
adjective conforming to fact and therefore worthy of belief
adjective not counterfeit or copied
originFrom Middle English authentik, from Old French autentique, from Latin authenticus, from Ancient Greek αὐθεντικός (authentikós, “authentic, genuine”), from Ancient Greek αὐθέντης (authéntēs, “perpetrator, murderer, absolute ruler”). Doublet of effendi.
Etymology from Wiktionary, CC BY-SA 3.0