Definitions from Wiktionary (toughen up)
▸ verb: (idiomatic, ambitransitive) To make or become mentally tougher.
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▸ verb: (idiomatic, ambitransitive) To make or become mentally tougher.
Similar:
toughen,
forharden,
forhard,
brace up,
enharden,
Harden,
buff up,
tough,
strengthen,
buck up,
more...
Opposite:
▸ Words similar to toughen up
▸ Usage examples for toughen up
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▸ Wikipedia articles (New!)
▸ Words that often appear near toughen up
▸ Rhymes of toughen up
▸ Invented words related to toughen up