a. | 1. | Hardened; indurated. |
2. | Hardened in mind; insensible; unfeeling; unsusceptible. |
Verb | 1. | callous - make insensitive or callous; deaden feelings or morals |
Adj. | 1. | callous - emotionally hardened; "a callous indifference to suffering"; "cold-blooded and indurate to public opinion" |