糠に釘ぬかにくぎ Expression Noun English jmdict 1 expressions (phrasesnoun (common) (futsuumeishi) idiomatic expression having no effect;waste of effort Other forms ぬかに釘 【ぬかにくぎ】
釘くぎ Common Noun English jmdict 1 noun (common) (futsuumeishi) nail;spike;tack;rivet;brad;(pachinko) pin その板に釘を打ってください。 Drive the nail into the board.
Shirabe