offensive, disgusting.

terrible, unpleasant, dreadful, alarming, repulsive, horrid, hideous, awful, ghastly, frightful, appalling, dire.

bloodcurdling, hair-raising, horrific, odious, gruesome, punk, scandalous, solemn, painful, sickening, noisome, dread, vile, atrocious, nightmarish, noxious, spine-chilling, imposing, good, flagitious, lousy, sucky, formidable, detestable, intimidating, unkind, grand, direful, distasteful, grisly, rotten, horrifying, obnoxious, nauseating, uncharitable, loathsome, frightening, execrable, repugnant, repellent, macabre, pitiless, lurid, wretched, nasty, evil, fear, grim, rancid, grievous, fearsome, foul, abhorrent, nightmare, redoubtable, despicable, august, fearful, frightful, stately, surly, inhuman, beautiful, noble, nauseous, cruel, terrific, revolting, slimy, worthless, forbidding, ugly, horrendous, alarming, portentous, gross, unspeakable, fulsome, hateful, tremendous, hard, dismal, terrifying, majestic, monstrous, obscene, shameful, unworthy, abominable, shocking, scary.

I never had such horrible dreams in my life. - "Warlock o' Glenwarlock", George MacDonald.

And then, horrible to tell! - "The Flight of the Shadow", George MacDonald.

It's horrible to imagine it. - "Masters of the Wheat-Lands", Harold Bindloss.

horribly, horridly, horrific, horrified, Crotalus Horridus Horridus, Heloderma Horridum, Moloch Horridus, Crotalus Horridus Atricaudatus, horrify.