でんかほうとうぬ 伝家の宝刀を抜く Show inflections LinksSentence search for 伝家の宝刀を抜くSentence search for でんかのほうとうをぬくKanji details for 伝, 家, 宝, 刀 and 抜Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'ku' ending1. to employ one's secret weapon; to play one's trump card; to use the ace up one's sleeveIdiomatic expression Discussions Log in to talk about this word.