tough‧en /ˈtʌf
ən/ (
also toughen up)
verb [intransitive and transitive] [
Word Family: adverb:
toughly,
tough,
toughly;
verb:
toughen;
noun:
toughness;
adjective:
tough]
to become tougher, or to make someone or something tougher:
toughened glass Three years in the army toughened him up. [TahlilGaran] Dictionary of Contemporary English ▲