unamiable

from The Collaborative International Dictionary of English v.0.48

Unamiable \Un*a"mi*a*ble\, a.
   Not amiable; morose; ill-natured; repulsive. --
   {Un*a"mi*a*bly}, adv.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

31 Moby Thesaurus words for "unamiable":
      chill, chilly, cold, cool, disaccordant, disagreeable, frosty, icy,
      ill, incompatible, inhospitable, inimical, strained, tense,
      unaffectionate, unamicable, unbenign, unbenignant, uncompassionate,
      uncompassioned, uncordial, unfriendly, ungenial, ungracious,
      unharmonious, unkind, unkindly, unloving, unsociable,
      unsympathetic, unsympathizing