(a.) Not benign; malignant.

abominable abrupt annoying antagonistic antipathetic at cross-purposes at loggerheads at odds at variance at war bad-tempered bearish bitchy bitter blunt brusque cankered cantankerous churlish clashing contradictory contrary crabbed cranky cross cross-grained crusty curt cussed differing disaccordant disagreeing discordant discourteous discrepant disgusting disharmonious dislikable disobliging displeasing disproportionate dissident dissonant distasteful distressing disturbing divergent excitable feisty foul-tasting fractious fretful grating grouchy had hostile huffish huffy ill ill-flavored ill-humored ill-mannered ill-tempered immiscible impolite inaccordant incompatible inharmonious inhospitable irascible irritable jangling jarring mean morose nasty nauseating nauseous negative noxious objectionable obnoxious odious offensive ornery out of accord out of whack peevish perverse pettish petulant querulous repellent repugnant repulsive revolting rotten rude short sickening snappish snappy sour spiteful spleeny splenetic sulky sullen testy thankless ugly unaffectionate unalluring unamiable unappealing unappetizing unattractive unbenign unbenignant uncivil uncompassionate uncompassioned uncongenial uncooperative uncordial uncourtly undelectable undelicious undesirable unengaging unenjoyable unfriendly ungenial ungracious unhappy unharmonious uninviting unkind unkindly unlikable unloving unpalatable unpleasant unpleasing unsavory unsympathetic unsympathizing untasteful untasty unwelcome variant waspish whiny woeful