Akademik

hardened
adjective
1. used of persons; emotionally hardened (Freq. 1)
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faced a case-hardened judge

Syn: ↑case-hardened, ↑hard-boiled
Similar to: ↑hard
2. made hard or flexible or resilient especially by heat treatment
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a sword of tempered steel

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tempered glass

Syn: ↑tempered, ↑treated, ↑toughened
Ant: ↑untempered (for: ↑tempered)
Similar to: ↑curable, ↑sunbaked
3. protected against attack (especially by nuclear weapons)
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hardened missile silos

Ant: ↑soft
4. made tough by habitual exposure
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hardened fishermen

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"a peasant, dark, lean-faced, wind-inured"- Robert Lynd

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"our successors...may be graver, more inured and equable men"- V.S.Pritchett

Syn: ↑enured, ↑inured
Similar to: ↑tough, ↑toughened
5. converted to solid form (as concrete)
Syn: ↑set
Similar to: ↑hard

Useful english dictionary. 2012.