9 letters · 19 points in Scrabble
originEtymology tree Ancient Greek ἄρχω (árkhō) Ancient Greek ἀρχι- (arkhi-)der. Latin archi-bor. Old English arċe- Middle English arch- English arch- English enemy English archenemy From arch- (“chief, most extreme”) + enemy.
Etymology from Wiktionary, CC BY-SA 3.0