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Classic usage
Reading level: hard
Estimated CEFR level: C1 — Advanced
Estimated from word frequency; not an official CEFR classification.
From Middle French nocturnal, from Latin nocturnālis (“nocturnal”), from Latin nocturnus (“nocturnal”), from Latin nox (“night”), from Proto-Indo-European *nókʷts (“night”). Cognates include Ancient Greek νύξ (núx), Sanskrit नक्ति (nákti), Old English niht (English night) and Proto-Slavic *noťь.
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Classic usage
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