indurate

1. become fixed or established;

"indurated customs"

2. make hard or harder;

"The cold hardened the butter"

3. become hard or harder;

"The wax hardened"

4. cause to accept or become hardened to; habituate;

"He was inured to the cold"

1. emotionally hardened;

"a callous indifference to suffering"

"cold-blooded and indurate to public opinion"