stony-hearted 
adjective
Very cruel or unfeeling: Boris was a stony-hearted professional terrorist they are stony-hearted...
- Even stone-hearted Higgenbotham had a hard time keeping a dry eye.
- The TV finally arrived and you would have had to be a very stony-hearted New Zealander not to be moved by Maori Television Service's first day.
- Yes, many people like the book, and it would be stony-hearted of me not to be pleased at their pleasure.
- apparently
- apparent magnitude
- apparent motion
- apparent movement
- apparent solar time
- apparent time
- apparent wind
- apparition
- apparitional
- appeal
- appealable
- appeal court
- appealer
- appealing
- appealingly
- appeals court
- appear
- appearance
- appearance money
- appear in print
- appease
- appeasement
- appeaser
- Appel, Karel
- appellant