toughen

== English == === Etymology === From tough +‎ -en. === Pronunciation === IPA(key): /ˈtʌfən/ Rhymes: -ʌfən === Verb === toughen (third-person singular simple present toughens, present participle toughening, simple past and past participle toughened) (transitive) To make tough. (intransitive) To become tough. ==== Derived terms ==== ==== Translations ==== === Anagrams === oughten == German == === Pronunciation === === Adjective === toughen inflection of tough: strong genitive masculine/neuter singular weak/mixed genitive/dative all-gender singular strong/weak/mixed accusative masculine singular strong dative plural weak/mixed all-case plural