adj. 25B6; adjective
a very unpleasant situation : DISAGREEABLE, irksome, troublesome, annoying, irritating, vexatious, displeasing, distressing, nasty, horrible, terrible, awful, dreadful, hateful, miserable, invidious, objectionable, offensive, obnoxious, repugnant, repulsive, repellent, revolting, disgusting, distasteful, nauseating, unsavoury.
an unpleasant man : UNLIKABLE, unlovable, disagreeable; unfriendly, rude, impolite, obnoxious, nasty, spiteful, mean, mean-spirited; insufferable, unbearable, annoying, irritating.
an unpleasant taste : UNAPPETIZING, unpalatable, unsavoury, unappealing, bitter, sour, rancid; disgusting, revolting, nauseating, sickening.
agreeable, likable.