IPA: /dɪsˈteɪstfəli/
KK: /dɪsˈteɪstfəlɪ/
In a way that shows dislike or disapproval.
She distastefully rejected the idea of going to the party.
Distastefully → It is formed from "dis-" (meaning apart or away) and "taste" (from Old French *tester*, meaning to perceive flavor) and the suffix "-fully" (meaning in a manner full of). The word "distastefully" means in a manner that is away from or lacking in taste or flavor, often implying a sense of disgust or disapproval.
Think of 'dis-' meaning 'away' and 'taste' as perceiving flavor; when something is done 'distastefully', it is done in a way that is away from good taste.