Plural of archenemy; the worst or most important enemies of someone or something.
From 'archi-' (chief, first) and 'enemy.' The prefix elevates 'enemy' to mean the most significant or principal rival, emphasizing supreme opposition rather than casual dislike.
Batman and the Joker are archenemies in the truest sense—'archi-' prefix actually appears in comic book terminology because it perfectly captures the idea of THE ultimate enemy, not just any rival.
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