To speak against someone or something; to deny, contradict, or express disagreement with a statement.
From Middle English, combining 'gain-' (from Old Norse 'gegn' meaning 'against') with 'say,' creating a literal meaning of 'to say against.' This construction shows how Old Norse and Old English combined directional prefixes with verbs.
Gainsay is a word that sounds like it should mean 'to say something good,' but it actually means the opposite—to contradict! This confusion happens because 'gain-' doesn't mean 'gain' in the profit sense but rather comes from Old Norse 'gegn' meaning 'against.'
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