welkin

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”).