- 1[transitive, intransitive] toughen (something) (up) to become or make something stronger, so that it is not easily cut, broken, etc. toughened glass
- 2[transitive] toughen something (up) to make something such as laws or rules stricter The government is considering toughening up the law on censorship.
- 3[transitive] toughen somebody (up) to make somebody stronger and more able to deal with difficult situations His parents sent him away to school to toughen him up.
BrE BrE//ˈtʌfn//; NAmE NAmE//ˈtʌfn//Verb Forms present simple I / you / we / they toughen
BrE BrE//ˈtʌfn//; NAmE NAmE//ˈtʌfn//he / she / it toughens
BrE BrE//ˈtʌfnz//; NAmE NAmE//ˈtʌfnz//past simple toughened
BrE BrE//ˈtʌfnd//; NAmE NAmE//ˈtʌfnd//past participle toughened
BrE BrE//ˈtʌfnd//; NAmE NAmE//ˈtʌfnd//-ing form toughening
BrE BrE//ˈtʌfnɪŋ//; NAmE NAmE//ˈtʌfnɪŋ//