Callous
Callous , adjective
[Latin callosus callous hard, from callum, callus, callous skin: compare French calleux.]
1.
Hardened; indurated.
A callous hand.
A callous ulcer.
2.
Hardened in mind; insensible; unfeeling; unsusceptible.
The callous diplomatist.
It is an immense blessing to be perfectly callous to ridicule.
A callousness and numbness of soul.