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Added 10 October 2026

know-it-all

/ˈnəʉ.ɪt.oːl/ noun

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about know-it-all at Wordnik → Where our words come from →

Someone who thinks he knows everything and refuses to accept advice or information from others.

Origin

From know + it + all.

From Wiktionary, via Kaikki.org (CC BY-SA)

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