hardened (Adjective) — Used of persons; emotionally hardened. ex. "faced a case-hardened judge"
hardened (Adjective) — Made hard, flexible or resilient especially by heat treatment. ex. "a sword of hardened steel"
hardened (Adjective) — Protected against attack (especially by nuclear weapons). ex. "hardened missile silos"
hardened (Adjective) — Made tough by habitual exposure. ex. "hardened fishermen"
hardened (Adjective) — Converted to solid form (as concrete).
hardened (Verb) — Become hard or harder. ex. "The wax hardened"
hardened (Verb) — Make hard or harder. ex. "The cold hardened the butter"
hardened (Verb) — Harden by reheating and cooling in oil. ex. "harden steel"
hardened (Verb) — Make fit. ex. "This trip will harden even the hardiest traveller"
hardened (Verb) — Cause to accept or become hardened to; habituate. ex. "He was hardened to the cold"