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toughen meaning in Bulgarian

EnglishBulgarian
toughen [toughened, toughening, toughens] (to become tougher)
verb
[UK: ˈtʌf.n̩]
[US: ˈtʌf.n̩]

втвърдявам сеverb

toughen [toughened, toughening, toughens] (to make tougher)
verb
[UK: ˈtʌf.n̩]
[US: ˈtʌf.n̩]

втвърдявамverb