IPA: /dɪsˈteɪstfəl.nəs/
KK: /dɪsˈteɪstfəl/
The quality of being unpleasant or causing dislike.
The distastefulness of the food made many guests leave the dinner early.
Distastefulness → It is formed from "dis-" (meaning apart or away) and "taste" (from Old French *taster*, meaning to perceive flavor) and "-fulness" (meaning the state of being full of). The word "distastefulness" refers to the state of being full of distaste or aversion to something.
Think of 'dis-' meaning 'apart' and 'taste' as perceiving flavor — when something is distasteful, it means it is something you want to keep 'apart' from your enjoyment.