expression, suru verb (special)
poverty dulls the wit
Proverb meaning that when one becomes poor, one's mind becomes dull and one loses good judgment.
貧すれば鈍するというが、彼はお金に困ってから判断力が鈍ったようだ。
As the saying goes, poverty dulls the wit; he seems to have lost his judgment since he ran into money trouble.
A classical Japanese proverb combining 貧する (to become poor) and 鈍する (to become dull). The exact historical origin is uncertain.