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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Coined by Thomas Henry Huxley in 1870. Either from Ancient Greek ἄγνωστος (ágnōstos, “ignorant, not knowing”), or from a- + Gnostic, deriving (either way) from Ancient Greek ἀ- (a-, “not”) + γιγνώσκω (gignṓskō, “I know”).
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tap / space
Classic usage
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