The quality or state of being full of disgust or of causing disgust.
From 'disgustful' plus '-ness', creating an abstract noun that nominates the quality itself. This represents triple-suffix stacking: 'disgust' + '-ful' + '-ness'.
When words like 'disgustfulness' require three-suffix combinations, they reveal that English prefers more common alternatives—notice how 'disgust' or 'disgustingness' are used instead, showing language naturally gravitates toward efficiency.
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