Synonyms of unpleasant in English:

disagreeable, irksome, troublesome, annoying, irritating, vexatious, displeasing, uncomfortable, distressing, nasty, horrible, appalling, terrible, awful, dreadful, hateful, detestable, miserable, abominable, execrable, odious, invidious, objectionable, offensive, obnoxious, repugnant, repulsive, repellent, revolting, disgusting, distasteful, nauseating, unsavoury, unpalatable, ugly

unlikable, unlovable, unattractive, disagreeable

unfriendly, inconsiderate, rude, impolite, obnoxious, nasty, spiteful, cruel, malicious, mean, mean-spirited, vicious, poisonous, venomous, vindictive, malign

frightful, ghastly, insufferable, unbearable, annoying, irritating

churlish, ill-natured, ill-humoured, ill-tempered, cross, bad-tempered

unappetizing, unpalatable, unsavoury, uninviting, unappealing, off-putting, inedible, uneatable, bitter, sour, rancid

disgusting, repugnant, revolting, nauseating, sickening, offensive, foul, rotten, vile