不ふ屈くつ不ふ撓とう

Meanings

1

indefatigability; indomitableness; unremitting tenacity

yojijukugo (four-character idiom)

A yojijukugo describing a spirit that never yields or tires, often used in formal or literary contexts to praise perseverance.

彼かれの不ふ屈くつ不ふ撓とうの精せい神しんが、ついに難なん事じ業ぎょうを成せい功こうさせた。
His indomitable spirit finally brought the difficult project to success.
不ふ屈くつ不ふ撓とうの努ど力りょくを続つづければ、いつか夢ゆめは叶かなう。
If you keep making unremitting efforts, your dream will come true someday.