1) Abrupt 2) Brutal 3) Cruel 4) Hurtful 5) Indurate 6) Intolerant 7) Merciless 8) Nasty 9) Pitiless 10) Unkind 11) Unsympathetic 12) Wounding 1) Cold 2) Cold-blooded 3) Coldhearted 4) Cruel 5) Emotionally hardened 6) Hard 7) Hard-hearted 8) Having calluses 9) Indurate 10) Insensitive 11) Merciless 12) Pachydermatous 13) Pitiless 14) Stony 15) Thick-skinned 16) Uncaring 17) Unemotional 18) Unfeeling 19) Unkind 20) Unsympathetic 
Callous is an adjective that may pertain to: ...
• (a.) Hardened; indurated. • (a.) Hardened in mind; insensible; unfeeling; unsusceptible.
Relating to a callus or callosity. ... (05 Mar 2000) ... 
(kal´әs) hardened. pertaining to or characterized by callus.
Cal'lous adjective [ Latin callosus callous hard, from callum , callus , callous skin: confer French calleux .] 1. Hardened; indurated. 'A callous hand.' Goldsmith. 'A callous ulcer.' Dunglison. 2. Hardened in mind; insensibl...
Type: Term Pronunciation: kal′ŭs Definitions: 1. Relating to a callus or callosity.
[adj] - emotionally hardened 2. [v] - make insensitive or callous
callous Hard; like a callus.
indurate adjective emotionally hardened; `a callous indifference to suffering`; `cold-blooded and indurate to public opinion`
emotionally hardened[Intelligent words] emotionally hardened