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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English smolderen (“to suffocate, stifle”), from Middle English smolder (“smoke, smoky vapour”), ultimately from Proto-West Germanic *smolōn (“to burn, glow, fume, smoulder”). Related to Proto-West Germanic *smallijan (> English smell).
smoulder
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Classic usage
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