indurate

/IH0 N D ER0 AH0 T/
verb
  1. 1

    To harden or to grow hard.

  2. 2

    To make callous or unfeeling.

  3. 3

    To inure; to strengthen; to make hardy or robust.

Synonyms

adjective
  1. 1

    Hardened, obstinate, unfeeling, callous.

    โ€œThe doctor removed a lot of indurate skin from his wound.โ€

Source: https://en.wiktionary.org/wiki/indurate