The quality of being dumpish; a somewhat dumpy quality or appearance; a somewhat gloomy or melancholic mood (archaic).
From 'dumpish' + noun-forming suffix '-ness,' creating an abstract noun describing the state or quality of being dumpish.
The '-ness' suffix is one of English's most productive tools for creating nouns from adjectives—you can almost attach '-ness' to any adjective to instantly create a noun, making English incredibly flexible.
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