無む駄だ骨ぼねを折おる

expression, godan verb (-ru)

waste one's efforts; work to no effect

Idiomatic expression meaning to put in effort that yields no useful result. Often used when the outcome is already determined or the task is pointless. Rare term, but the concept is common.

• そんなことをしても無む駄だ骨ぼねを折おるだけだ。

  You'll just be wasting your efforts if you do that.

• 彼かれは無む駄だ骨ぼねを折おって、結けっ局きょく何なにも得えられなかった。

  He worked to no effect and ended up gaining nothing.