1The company's callous decision to lay off hundreds of employees without notice sparked widespread outrage.
2Is it callous to ignore someone's messages when you're busy, or is it just practical?
3Her callous attitude towards her colleagues made it difficult for her to build strong working relationships.
4If you're going to fire someone, do it with empathy, not in a callous manner that leaves them feeling humiliated.
5The callous disregard for human life shown by the perpetrators of the crime shocked the entire nation.