(a.) Exciting, or tending to excite, horror or fear; dreadful; terrible; shocking; hideous; as, a horrible sight; a horrible story; a horrible murder.

abhorrent abominable appalling arrant astounding atrocious awe-inspiring awesome awful baneful base beastly beneath contempt blameworthy brutal contemptible deadly deplorable despicable detestable dire direful disagreeable disgusting dread dreaded dreadful egregious enormous fearful fell fetid filthy flagrant forbidding formidable foul frightening frightful fulsome ghastly ghoulish grievous grim grisly gross gruesome harrowing hateful heinous hideous horrendous horrid horrific horrifying howling infamous lamentable loathsome lousy lurid macabre monstrous morbid nasty nauseating nauseous nefarious noisome notorious obnoxious odious offensive outrageous pitiable pitiful rank redoubtable regrettable repellent repelling reprehensible repugnant repulsive revolting rotten rousing sad scandalous schlock schrecklich scurvy shabby shameful shocking shoddy sickening sordid squalid terrible terrific terrifying thumping too bad tragic tremendous unclean unpleasant unspeakable vile villainous whacking woeful worst worthless wretched