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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Old French, from Latin rigor (“stiffness, rigidity, rigor, cold, harshness”), from rigere (“to be rigid”).
asperity, grimness, hardship, rigour, severity, severeness, rigorousness, rigourousness
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Classic usage
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