IPA: /ˈloʊθsəm/
KK: /ˈloʊθsəm/
Causing strong feelings of dislike or disgust; very unpleasant or offensive.
The loathsome smell from the garbage made everyone feel sick.
Loathsome → It is formed from "loath" (from Old English *lath*, meaning hateful or offensive) and "-some" (meaning characterized by or causing). The word "loathsome" describes something that is characterized by causing hatred or disgust.
Think of something that is 'hateful' ('loath') and 'causes' ('-some') strong feelings of disgust — that's what loathsome means.