arch-enemy From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA principal enemy.A supreme and most powerful enemy. Related wordsSynonymsarchfoearch-rivalarch rivalarch-rivalryarch rivalryarch-criminalarch-leaderarch-chiefarchimagusantianarchistantagoniserarch-commanderanticentristarschinarkhimedessuper-villainanti-hero References Wiktionary — arch-enemy Wikipedia — arch-enemy