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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English diabolik, from Middle French diabolique, from Late Latin diabolicus, from Ancient Greek διαβολικός (diabolikós, “devilish”), from διάβολος (diábolos, “devil”). First attested in 1350–1400.
devilish, diabolical, mephistophelian, mephistophelean
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