でんかのほうとう

伝家の宝刀

表記・読み：殿下の宝刀・でんかのほうとう

1. 1

   one's last resort; trump card

   expressions (phrases, clauses, etc.)名詞idiomatic expression
2. 2

   treasured family sword

   expressions (phrases, clauses, etc.)名詞orig. meaning