indurate

Adjective
  1. Emotionally hardened (synset 302114442)
    "a callous indifference to suffering"; "cold-blooded and indurate to public opinion"
Verb
  1. Become fixed or established (synset 200577461)
    "indurated customs"
  2. Make hard or harder (synset 200444339)
    "The cold hardened the butter"
  3. Become hard or harder (synset 200444071)
    "The wax hardened"
  4. Cause to accept or become hardened to;
    Habituate (synset 200273709)
    "He was inured to the cold"

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