hardened

Adjective

• converted to solid form (as concrete)

• 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
    

• protected against attack (especially by nuclear weapons)
  • hardened missile silos
    

• made hard or flexible or resilient especially by heat treatment
  • a sword of tempered steel
    
  • tempered glass
    

• used of persons; emotionally hardened
  • faced a case-hardened judge
    

Related words

• Synonyms: 
  set , enured , inured , tempered , treated , toughened , case-hardened , hard-boiled
• Antonyms: 
  soft , untempered , unhardened