毒どく薬やく変へんじて薬くすりとなる

expression, godan verb (-ru)

poison can turn into medicine; what is harmful may become beneficial

Proverb meaning that something initially harmful or unpleasant can, through change or circumstance, become beneficial. Often used to encourage a positive outlook on adversity.

• 失しっ敗ぱいも毒どく薬やく変へんじて薬くすりとなることがある。

  Even failure can sometimes turn into a blessing in disguise.