indurate

(verb) become fixed or established. Example: "Indurated customs."

(verb) make hard or harder. Synonyms: harden. Example: "The cold hardened the butter."

(verb) become hard or harder. Synonyms: harden. Example: "The wax hardened."

(verb) cause to accept or become hardened to; habituate. Synonyms: inure, harden. Example: "He was inured to the cold."

(adj) emotionally hardened. Synonyms: callous, pachydermatous. Examples: "A callous indifference to suffering." "Cold-blooded and indurate to public opinion."