IPA: /dɪˈtɛstəblnəs/
KK: /dɪˈtɛstəblnəs/
The condition of being very unpleasant or deserving strong dislike.
The detestableness of his actions shocked everyone in the room.
Detestableness → It is formed from "detest" (from Latin "detestari", meaning to detest or to loathe) and the suffix "-able" (meaning capable of) combined with "-ness" (meaning the state or quality of). The word "detestableness" refers to the quality of being detestable or loathsome.
Think of 'detest' which means to strongly dislike, and remember that 'detestableness' refers to the quality of being strongly disliked.