Irritating, annoying, or exasperating; something that causes vexation or frustration.
From Old French 'agacer' (to irritate), likely from a Romance root meaning to grate or scrape. The '-ant' suffix makes it an adjective form, creating a French-influenced English word.
This delightfully obscure word is pure French attitude—'agacant' sounds like exactly what it means, with that scratchy 'gac' sound that makes you feel irritated just saying it.
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