heartless; uncaring; indifferent;
having a total disregard for others.
The callous boy did not care about hurting her feelings.
Callous reminds of callus.
A callus is hardened skin on the hand or foot.
A callus has no feeling because the skin is so thick.
Used at work:
She is a cold and callous receptionist. No sob story will work on her.
(c) 2015 E. Carruthers