IPA: /rɪˈpʌɡnənt/
KK: /rɪˈpʌɡnənt/
Causing a strong feeling of dislike or disgust; something that is very unpleasant or offensive.
The idea of cheating on the test was repugnant to her.
Repugnant is formed from "re-" (meaning against) and "pugnare" (meaning to fight). The word describes something that fights against one's feelings or is offensive.
Think of something that is 'against' ('re-') your feelings and 'fights' ('pugnare') your sense of comfort — that's why repugnant means something that is offensive or distasteful.