The Collaborative International Dictionary of English v.0.48:
coldhearted \cold"heart`ed\, cold-hearted \cold"-heart`ed\, a. Wanting passion or feeling or emotional warmth; indifferent. -- cold"-heart`ed*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
coldhearted adj 1: lacking in sympathy or feeling [ant: warmhearted]