I. adjective
utterly unpleasant or distasteful to the senses or sensibilities
the offensive odor of garbage
her arrogant assurance was more than a little offensive
Synonyms: atrocious, disgusting, evil, foul, hideous, horrible, horrid, icky, loathsome, nasty, nauseating, noisome, obscene, repellent, repugnant, repulsive, revolting, sickening, ungrateful, unwholesome, vile
Related Word: abhorrent, bad, disagreeable, objectionable, uncongenial, unpleasant; abominable, detestable, fulsome, odious; rank; appalling, awful, beastly, dreadful, frightful, ghastly, grim, grisly, gruesome, lurid, shocking, terrible; unappetizing, unpalatable, unsavory
Contrasted words: agreeable, appealing, attractive, pleasant, pleasing; favorable, unobjectionable, welcome; appetizing, palatable, savory; divine
Antonyms: inoffensive, unoffensive
II. noun
Synonyms: attack 1, aggression, assailment, assault, offense, onfall, onset, onslaught