The Collaborative International Dictionary of English v.0.48:
Soft-hearted \Soft"-heart`ed\, a. Having softness or tenderness of heart; susceptible of pity or other kindly affection; gentle; meek. -- Soft"-heart`ed*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
softheartedness n 1: a feeling of concern for the welfare of someone (especially someone defenseless) [syn: softheartedness, tenderness]