形容詞 loathsome:

1. causing or able to cause nausea
   同義詞：nauseating, nauseous, noisome, queasy, offensive, sickening, vile
2. highly offensive; arousing aversion or disgust
   同義詞：disgusting, disgustful, distasteful, foul, loathly, repellent, repellant, repelling, revolting, skanky, wicked, yucky

1. A contemptible, untrustworthy, or loathsome person.
   可鄙者，不可信賴者，令人討厭者
2. Something loathsome, despicable, or worthless.
   污垢，渣滓，可鄙者令人厭惡、可鄙或無用的事物
3. Murder is a vile and loathsome crime.
   謀殺是邪惡而令人發(fā)指的罪行。
4. There is a loathsome smell of rotting flesh in the room.
   房間里有一股令人難受的腐肉的臭味。

loath.some

adj.（形容詞）
Arousing loathing; abhorrent.See Synonyms at offensive
可惡的：引起惡感的；可惡的參見 offensive

來源：
Middle English lothsome
中古英語 lothsome
loth [hateful] * see loath
loth [可恨的] *參見 loath
-som [adj. suff.] * see -some
-som [形容詞性后綴] *參見 -some

【引伸】
loath.somely
adv.（副詞）
loath.someness
n.（名詞）