IPA: /dɪsˈɡʌstɪŋli/
KK: /dɪsˈɡʌstɪŋli/
In a way that causes strong feelings of dislike or revulsion.
The food was prepared disgustingly, making it hard to eat.
Disgustingly → It is formed from "dis-" (meaning apart or away) and "gustare" (meaning to taste). The word "disgustingly" refers to something that is so unpleasant or distasteful that it causes a strong feeling of aversion or repulsion, as if one wants to be away from the taste of it.
Think of something that makes you want to be 'away' ('dis-') from a 'taste' ('gustare') because it is so unpleasant — that's why something is described as disgusting.