English to English

adjective (a)

• physically toughened

  secara fisik dikeraskan

  Synonym:
  tough
  Antonym:
  tender, untoughened
  

  source: wordnet30
• made hard or flexible or resilient especially by heat treatment

  membuat keras atau fleksibel atau tangguh terutama oleh panas rawatan

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

  source: wordnet30