indurate in WordNet English dictionary

1. emotionally hardened
   "a callous indifference to suffering"; "cold-blooded and indurate to public opinion"
   callous  indurate  pachydermatous 
   

1. become hard or harder
   "The wax hardened"
   harden  indurate 
   
2. make hard or harder
   "The cold hardened the butter"
   harden  indurate 
   
3. cause to accept or become hardened to; habituate
   "He was inured to the cold"
   inure  harden  indurate 
   
4. become fixed or established
   "indurated customs"
   indurate