cal·lous 
/ˈkæləs/ adjective
/ˈkæləs/ adjective [more callous; most callous] disapproving : not feeling or showing any concern about the problems or suffering of other people
▪ a selfish and callous young man ▪ a callous refusal to help the poor ▪ a very callous remark
▪ a selfish and callous young man ▪ a callous refusal to help the poor ▪ a very callous remark
— cal·lous·ly adverb
▪ Some of us were treated callously.
▪ Some of us were treated callously.
— cal·lous·ness noun [noncount]
▪ callousness toward the poor
▪ callousness toward the poor
