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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Latin sciūrus (“squirrel”), from Ancient Greek σκίουρος (skíouros, “squirrel”), from σκιά (skiá, “shadow”) + οὐρά (ourá, “tail”), + -ine.
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Classic usage
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