unwelcome, good, off-putting, disconcerting, bitter, upsetting, infuriating, wicked, sour, rotten, uncongenial, offensive, vexing, yucky, harsh, unpalatable, exasperating, unsavory, icky, unsympathetic, pain, nasty, distasteful, maddening
bad (part of speech: adjective)
ugly (part of speech: adjective)
inelegant, unlovely, disfigured, repellent, plain, unattractive, ill-looking, grotesque, unappealing, abhorrent, ugly, repugnant, shapeless, disagreeable, unsightly, unpleasant, unaesthetic, unpleasing, repulsive, homely, hideous, undesirable, odious
displeasing (part of speech: verb)
- It was exactly what Gwynneth did feel, and the sensation was by no means displeasing to her. - "Peccavi", E. W. Hornung.
- Touchstone's motley was far too glaring, and the crude white of Rosalind's bridal raiment in the last act was absolutely displeasing. - "Reviews", Oscar Wilde.
- Transactions of this sort have not at all been displeasing and repugnant to your feelings heretofore. - "The Life and Times of Ulric Zwingli", Johann Hottinger.