(adjective, verb)


1. used of persons; emotionally hardened

- faced a case-hardened judge

Similar word(s): hard

2. made hard or flexible or resilient especially by heat treatment

Similar word(s): curable, sunbaked, tempered, toughened, treated

3. protected against attack (especially by nuclear weapons)

- hardened missile silos

4. made tough by habitual exposure

- hardened fishermen

Similar word(s): tough, toughened, enured, inured

5. converted to solid form (as concrete)

Similar word(s): hard, set


1. simple past tense and past participle of harden