Heart·less, a.
  1. Without a heart.
     You have left me heartless; mine is in your bosom.   --J. Webster.
  2. Destitute of courage; spiritless; despondent.
     Heartless they fought, and quitted soon their ground.   --Dryden.
     Heartless and melancholy.   --W. Irwing.
  3. Destitute of feeling or affection; unsympathetic; cruel. “The heartless parasites.”
  -- Heart*less*ly, adv. -- Heart*less*ness, n.
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  heartlessness
       n : an absence of concern for the welfare of others [syn: coldheartedness,
            hardheartedness]