Adjective
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converted to solid form (as concrete)
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made tough by habitual exposure
"hardened fishermen"
"a peasant, dark, lean-faced, wind-inured"- Robert Lynd
"our successors...may be graver, more inured and equable men"- V.S.Pritchett
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protected against attack (especially by nuclear weapons)
"hardened missile silos"
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made hard or flexible or resilient especially by heat treatment
"a sword of tempered steel"
"tempered glass"
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used of persons
emotionally hardened
"faced a case-hardened judge"
- case hardened - hard boiled