expression, godan verb (-ru)
adversity strengthens the foundations; what doesn't kill you makes you stronger
Proverb meaning that hardship or conflict ultimately leads to a stronger, more stable situation. Often used to encourage perseverance.
夫婦喧嘩も雨降って地固まるというから、仲直りすれば前より絆が深まるよ。
They say that after a storm comes a calm, so if you make up, your bond will be even stronger than before.
あの大失敗があったからこそ、今の成功がある。まさに雨降って地固まるだ。
It's precisely because of that huge failure that we have today's success. Truly, adversity strengthens the foundations.