不ふ撓とう不ふ屈くつ

noun, noun which may take the genitive case particle 'no'

tenacity; indomitability; unyielding spirit

A yojijukugo describing a strong will that never bends or breaks, used in formal or literary contexts to praise perseverance.

• 彼かれの不ふ撓とう不ふ屈くつの精せい神しんが、ついに難なん病びょうを克こく服ふくさせた。

  His indomitable spirit finally enabled him to overcome the serious illness.

• 不ふ撓とう不ふ屈くつの努ど力りょくで目もく標ひょうを達たっ成せいした。

  Through tenacious effort, he achieved his goal.