transitive verb, intransitive verb
Related Forms:
See toughen in American Heritage Dictionary 4
(tŭfˈən)
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Also Mentioned In
» adhesive
» anneal
» coarsen
» glass
» harden
» inure
» planish
» plastic
» strengthen
» temper
Browse entries near toughen
tough row to hoe
tough sledding
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tough-minded (synonyms)
tough-mindedness
toughen (synonyms)
toughener
toughie
toughie (synonyms)
toughies