The quality of being emotionally unresponsive or indifferent to the feelings of others.

दूसरों की भावनाओं के प्रति उदासीनता की विशेषता

English Usage: His coldheartedness made it difficult for him to form meaningful relationships.

Hindi Usage: उसकी दिल के ठंडेपन के कारण meaningful संबंध बनाना कठिन हो गया।