uncompassionate

from WordNet (r) 3.0 (2006)

uncompassionate
    adj 1: lacking compassion or feeling for others; "nor silver-
           shedding tears could penetrate her uncompassionate sire"-
           Shakespeare [ant: {compassionate}]

from The Collaborative International Dictionary of English v.0.48

Uncompassionate \Uncompassionate\
   See {compassionate}.

from Moby Thesaurus II by Grady Ward, 1.0

44 Moby Thesaurus words for "uncompassionate":
      bowelless, callous, coldhearted, cruel, disagreeable, dog-eat-dog,
      flinty, hard, hard-boiled, hardhearted, harsh, heartless, ill,
      inclement, inexorable, inhospitable, merciless, obdurate, pitiless,
      relentless, remorseless, ruthless, unaffectionate, unamiable,
      unbenign, unbenignant, uncompassioned, uncordial, unemotional,
      unfeeling, unforgiving, ungenial, ungracious, unkind, unkindly,
      unloving, unmerciful, unpitiful, unpitying, unremorseful,
      unsympathetic, unsympathizing, unyielding, without mercy