Définition "toughen" dans le dictionnaire Collins English Dictionary & Thesaurus

toughen (toughens 3rd person present) (toughening present participle) (toughened past tense & past participle )

1 verb If you toughen something or if it toughens, you make it stronger so that it will not break easily.
Do not add salt to beans when cooking as this tends to toughen the skins. V n, Also V

2  verb If a person, institution, or law toughens its policies, regulations, or punishments, it makes them firmer or stricter.
Talks are under way to toughen trade restrictions...  V n
  Toughen up means the same as toughen., phrasal verb

3  verb If an experience toughens you, it makes you stronger and more independent in character.
They believe that participating in fights toughens boys and shows them how to be men.  V n
  Toughen up means the same as toughen., phrasal verb