loathe:
To dislike (someone or something) greatly; abhor.
To be hateful or loathed; excite nausea, disgust, or abhorrence.
To feel nausea, disgust, or abhorrence.
Synonyms for loathsome
abhorrent, abominable, appalling, awful, disgusting, distasteful, dreadful, evil, foul, fulsome, gross, hideous, horrendous, horrible, horrid, nasty, nauseating, nauseous, noisome, noxious, obnoxious, obscene, odious, offensive, rancid, repellent (also repellant), repugnant, repulsive, revolting, scandalous, shocking, sickening, ugly