堅けん忍にん不ふ抜ばつ

na-adjective, noun

indomitable perseverance; invincible fortitude

A yojijukugo describing unwavering determination and endurance in the face of hardship. Often used in formal or literary contexts to praise steadfast character.

• 彼かれは堅けん忍にん不ふ抜ばつの精せい神しんで難なん局きょくを乗のり越こえた。

  He overcame the crisis with indomitable perseverance.

• 成せい功こうには堅けん忍にん不ふ抜ばつの努ど力りょくが必ひつ要ようだ。

  Success requires invincible fortitude.