1. (adj) case-hardened, hardened, hard-boiled
used of persons; emotionally hardened
Synonyms: tempered, toughened, set, hardened, inured, pugnacious, treated, case-hardened, enured, hard-boiled, hard-bitten
Antonyms: untoughened, tender, soft
2. (adj) tempered, treated, hardened, toughened
made hard or flexible or resilient especially by heat treatment
Synonyms: tough, toughened, set, tempered, hardened, inured, treated, case-hardened, enured, hard-boiled
Antonyms: untoughened, tender, soft
3. (adj) hardened
protected against attack (especially by nuclear weapons)
Synonyms: toughened, set, tempered, inured, treated, case-hardened, enured, hard-boiled
Antonyms: tender, untoughened, soft
4. (adj) enured, inured, hardened
made tough by habitual exposure
Synonyms: tempered, toughened, set, hardened, inured, treated, case-hardened, enured, hard-boiled
Antonyms: untoughened, soft, tender
5. (adj) hardened, set
converted to solid form (as concrete)
Synonyms: placed, treated, determined, set, fit(p), tempered, situated, toughened, hard-boiled, set(p), case-hardened, hardened, inured, primed(p), fixed, dictated, located, laid, enured, rigid
Antonyms: soft, tender, untoughened
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Synonyms and Antonyms of hardened 
