ぬかくぎ 糠に釘 LinksSentence search for 糠に釘Sentence search for ぬかにくぎSentence search for ぬかに釘Kanji details for 糠 and 釘Edit in JMdict Expressions (phrases, clauses, etc.), Noun1. having no effect; waste of effortIdiomatic expressionOther formsぬかに釘 【ぬかにくぎ】 Discussions Log in to talk about this word.