harden

Verb
  • Become hard or harder (synset 200444071)
  • Make hard or harder (synset 200444339)
  • Harden by reheating and cooling in oil (synset 200303656)
  • Make fit (synset 200295901)
  • Cause to accept or become hardened to
    Habituate (synset 200273709)

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