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]
cold-heartedness \cold"-heart`ed*ness\ n. an absence of concern for the welfare of others; indifference to the suffering of others. Syn: heartlessness, hardheartedness. [WordNet 1.5 +PJC]