無駄骨 むだぼね Also written 徒骨 Meanings Noun wasted effort; fruitless effort; vain efforts Kanji 無 without. Read as ム. 駄 useless 骨 bone. Read as ほね. Example sentences 彼は、しばしば、無駄骨を折る。He often goes off on wild goose chases. 無駄骨を折るだけだ。It is like looking for a needle in a haystack. Words containing 無駄骨 無駄骨折り (むだぼねおり) laboring in vain 無駄骨を折る (むだぼねをおる) to waste one's efforts Jinuma: Japanese Dictionary · Word lists