What is the meaning of tempered?

verb

• Bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling.
  • usage: "temper glass"
  • synonyms: anneal, temper, normalize
• Harden by reheating and cooling in oil.
  • usage: "temper steel"
  • synonyms: temper, harden
• Adjust the pitch (of pianos.
  • synonyms: temper
• Make more temperate, acceptable, or suitable by adding something else; moderate.
  • usage: "she tempered her criticism"
  • synonyms: temper, season, mollify
• Restrain.
  • synonyms: chasten, moderate, temper

adjective

• Made hard or flexible or resilient especially by heat treatment.
  • usage: "a sword of tempered steel"; "tempered glass"
  • synonyms: treated, hardened, toughened
• Adjusted or attuned by adding a counterbalancing element.
  • usage: "criticism tempered with kindly sympathy"