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.
 ◄ ►
 heartlessly
      adv : in a heartless manner; "she behaves rather heartlessly
            toward her admirers"