The quality or state of being bothersome; the degree to which something is annoying, troublesome, or inconvenient.
Derived from 'bothersome' plus the suffix '-ness,' which creates abstract nouns from adjectives; this follows the standard English pattern for converting qualities into measurable properties.
The suffix chain 'bother-some-ness' shows how English lets us measure and discuss abstract qualities—we're essentially asking 'how much bothersome-ness does this have?' like measuring how tall something is!
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