toughen

From tough +‎ -en.

• IPA^(key): /ˈtʌfən/

• Audio (Southern England):

  (file)

• Rhymes: -ʌfən

toughen (third-person singular simple present toughens, present participle toughening, simple past and past participle toughened)

1. (transitive) To make tough.

   The new training program is designed to toughen the athletes.

   A cold shower every morning will toughen your skin.

2. (intransitive) To become tough.

• oughten

• Audio (Germany (Berlin)):

  (file)

toughen

1. inflection of tough:
   1. strong genitive masculine/neuter singular
   2. weak/mixed genitive/dative all-gender singular
   3. strong/weak/mixed accusative masculine singular
   4. strong dative plural
   5. weak/mixed all-case plural