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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Late Latin crypticus, from Ancient Greek κρυπτικός (kruptikós), from κρυπτός (kruptós, “hidden”), from κρύπτω (krúptō, “to hide”). Doublet of kryptic.
cryptical, deep, inscrutable, mysterious, mystifying
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Classic usage
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