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harden definition

harden (härd′'n)

transitive verb

  1. to make solid, rigid, or firm
  2. to make callous to harden one's heart
  3. to accustom to varying or adverse conditions or climate

Etymology: ME hardnen < ON harthna & < ME hard, hard

intransitive verb

to become solid, rigid, callous, etc.

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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