tempered

Adjective

• adjusted or attuned by adding a counterbalancing element
  • criticism tempered with kindly sympathy
    

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

Related words

• Synonyms: 
  treated , hardened , toughened
• Antonyms: 
  untempered , unhardened