insensitive, indurate, thick-skinned, hardened, battle-hardened, cold-hearted, insensible, heartless, coldhearted, ice-hearted, more...

compassionate, empathetic, sensitive, caring, kind-hearted

hard, thick, dry, cracked, red, more...

most unfeeling,   cold and unfeeling,   feeling insensitive,   heartless person,   negligent uncaring,   more insensitive,   without compassion,   hardened heart,   cold hearted person,   more hard-hearted