Synonyms for Unprepossessing:

adj.

all (adjective)
unpresentable.
ugly (adjective)
grotesque, unsightly, monstrous, plain, hideous.
unsightly (adjective)
unattractive, ugly.

n.

ugly, unsightly, plain, unappealing, grim, monstrous, hideous, grotesque. unprepossessing (noun)
unpresentable, unattractive.

Other synonyms:

Other relevant words:
ugly, unsightly, plain, unappealing, grim, monstrous, hideous, grotesque.

Usage examples for unprepossessing

  1. Why, no- not to look at: her nature is beautiful, but her manner and figure are rather- rather unprepossessing at first. – Not Pretty, But Precious by John Hay, et al.
  2. The Marquis de la Romans was a little swarthy man, of unprepossessing and rather common appearance; but he had a considerable share of talent and information. – Memoirs of Napoleon Bonaparte, v10 by Louis Antoine Fauvelet de Bourrienne
  3. Slatius protested his innocence of any such design, and vehemently besought the officer to release him, telling him as a reason for his urgency and an explanation of his unprepossessing aspect- that he was an oculist from Amsterdam, John Hermansen by name, that he had just committed a homicide in that place, and was fleeing from justice. – The Life of John of Barneveld, 1619-23 by John Lothrop Motley