adjective (a)

• not brought to a proper consistency or hardness(adj.all)

  Example:
  Untempered mortar.
  Untempered steel.
  

  Synonym:
  unhardened
  Antonym:
  hardened, tempered, toughened, treated
  

  source: wordnet30
• not moderated or controlled(adj.all)

  Example:
  His untempered individualism.
  

  Antonym:
  tempered
  

  source: wordnet30