toughened

Adjective
Synonyms: toughtemperedtreatedhardened

WordNet 3.0

Adjective (2)

  1. physically toughened“the tough bottoms of his feet”Synonyms: tough
  2. made hard or flexible or resilient especially by heat treatment“a sword of tempered steel”“tempered glass”Synonyms: temperedtreatedhardened
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Webster's Dictionary (GCIDE)

Toughen \Tough"en\, v. i. & t. [imp. & p. p. Toughened; p. pr. & vb. n. Toughening.] To grow or make tough, or tougher. [1913 Webster]
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