noun
luck, perseverance, and patience (the three keys to success)
A set phrase listing three traditional virtues for achieving a goal: 運 (luck), 根 (perseverance/steadfastness), and 鈍 (patience/dull persistence). Often used in self-help or motivational contexts.
成功の秘訣は運根鈍だと言われる。
It is said that the secret to success is luck, perseverance, and patience.
彼は運根鈍を座右の銘にしている。
He lives by the motto of luck, perseverance, and patience.
根気 means 'perseverance' or 'patience' in a general sense; 根 in 運根鈍 specifically implies steadfastness.
鈍感 means 'insensitivity' or 'thick-skinned'; 鈍 in 運根鈍 suggests a positive, patient dullness.
A compound of 運 (luck), 根 (root/steadfastness), and 鈍 (dullness/patience). The exact origin is uncertain, but it is a traditional Japanese saying emphasizing the three virtues needed for success.