The state or quality of feeling strong disapproval or revulsion.
From 'disgusted' plus the nominalization suffix '-ness', which converts adjectives into abstract nouns. This follows the pattern of English word formation going back centuries.
English speakers love turning feelings into countable things—'disgustedness' is one of hundreds of '-ness' nouns that let us name emotions as if we could measure them, a quirk that reveals how we think about psychology.
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