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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Inherited from Middle English welken, wolken (“weather; heavens; earlier cloud”), from Old English wolcnu (“sky, heavens”), plural form of wolcn (“cloud”), from Proto-West Germanic *wolkn (“cloud”), from Proto-Germanic *wulkną (“cloud”), possibly from Proto-Indo-European *wĺ̥ɡ-no-m, from *welg- (“damp; wet”). Cognate with Dutch wolk (“cloud”), German Wolke (“cloud”).
celestial sphere, sphere, empyrean, firmament, heavens, vault of heaven
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tap / space
Classic usage
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