Word parts

change

tough + -en

Pronunciation

change
  • IPA (key): /ˈtʌfən/
  • Duration: 2 seconds.(file)

Plain form
toughen

Third-person singular
toughens

Past tense
toughened

Past participle
toughened

Present participle
toughening

  1. (transitive) If you toughen something, you make it tough.
  2. (intransitive) If something toughens, it becomes tough.
change