horrendous

1 causing fear a horrendous explosion shook the building Synonyms alarming, dire, direful, dread, dreadful, fearsome, forbidding, formidable, frightening, frightful, ghastly, hair-raising, fearful, horrible, horrifying, intimidating, redoubtable, scary, shocking, spine-chilling, terrible, terrifyingRelated Words daunting, demoralizing, disconcerting, discouraging, dismaying, disquieting, distressing, disturbing, perturbing, startling, threatening, troubling, trying, unnerving; bone-chilling, creepy, eerie (also eery), weird; appalling, atrocious, awful, grisly, gruesome (also grewsome), hideous, horrid, macabre, monstrous, nightmarishNear Antonyms calming, comforting, consoling, inviting, lulling, pacifying, quieting, reassuring, relaxing, soothing, tranquilizing (also tranquillizing); nonintimidating, nonthreatening

2 causing intense displeasure, disgust, or resentment a horrendous breach of good manners that should not escape censure Synonyms abhorrent, abominable, appalling, awful, disgusting, distasteful, dreadful, evil, foul, fulsome, gross, hideous, offensive, horrible, horrid, loathsome, nasty, nauseating, nauseous, noisome, noxious, obnoxious, obscene, odious, rancid, repellent (also repellant), repugnant, repulsive, revolting, scandalous, shocking, sickening, uglyRelated Words exceptionable, objectionable; brackish, disagreeable, dislikable (also dislikeable), unpleasant; contemptible, despicable, detestable, hard, hateful; unhealthy, unsavory, unwholesome; execrable, lousy, miserable; atrocious, frightful, ghastly, grim, grisly, gruesome (also grewsome), heinous, offensive, horrific, horrifying, lurid, macabre, monstrous, nightmarish, shocking, sick, sickish, sickly, terrible, unspeakable, vile; off-putting, undesirable, unwanted, unwelcome; barbarous, unchristian, uncivilized, ungodly, unholy; distressing, disturbing, upsettingNear Antonyms acceptable, agreeable, alluring, appealing, attractive, blessed (also blest), congenial, darling, delectable, delicious, delightful, delightsome, desirable, dreamy, dulcet, enjoyable, felicitous, gratifying, heavenly, inviting, likable (or likeable), luscious, nice, palatable, pleasant, pleasing, pleasurable, satisfying, savory (also savoury), sweet, welcome; unexceptionable, unobjectionable; healthful, healthy, restorative, salubrious, salutary, wholesomeAntonyms innocuous, inoffensive

3 extremely disturbing or repellent emergency room personnel must not flinch even from the most horrendous injuries Synonyms appalling, atrocious, awful, dreadful, frightful, ghastly, grisly, gruesome (also grewsome), hideous, horrible, horrid, horrific, horrifying, lurid, macabre, monstrous, nightmare, nightmarish, shocking, terrible, terrificRelated Words alarming, bloodcurdling, dire, direful, fearful, fearsome, forbidding, formidable, frightening, gut-wrenching, hair-raising, heart-stopping, intimidating, redoubtable, scary, terrifying; abhorrent, deplorable, disagreeable, disgusting, distasteful, loathsome, nauseating, noisome, obnoxious, obscene, offensive, repugnant, repulsive, revolting, sickening; abominable, evil, foul, heinous, noxious, odious, unspeakable, vile; grotesque, ugly, unsightlyNear Antonyms agreeable, appealing, attractive, delectable, delicious, delightful, enjoyable, enticing, inviting, pleasant, pleasing, pleasurable, satisfying, welcome; cheering, comforting, soothing