1. Having calluses; toughened: callous skin on the elbow.
2. Emotionally hardened; "a callous indifference to suffering"; "cold-blooded and indurate to public opinion"
Synonyms: indurate, pachydermatous, insensitive - deficient in human sensibility; not mentally or morally sensitive
Meanwhile, urmm, unrelated, this news:
Mis-Adventure, Confirms Coroner.
Kedahans will know these words: Dah Mangli
Pix from The Malaysian Insider