inured

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

(adj) made tough by habitual exposure. Synonyms: enured, hardened. Examples: "Hardened fishermen." "A peasant, dark, lean-faced, wind-inured"- robert lynd." "Our successors...may be graver, more inured and equable men"- v.s.pritchett."