不ふ臣しん

noun

disloyalty; unfaithfulness

Formal, somewhat literary term for disloyalty, especially toward a lord, ruler, or country. Often used in historical or political contexts.

• 家か臣しんの不ふ臣しんが露ろ見けんし、主しゅ君くんは激げき怒どした。

  The retainer's disloyalty was exposed, and the lord flew into a rage.

• 不ふ臣しんの罪つみで処しょ刑けいされた武ぶ将しょうもいた。

  Some warlords were executed for the crime of disloyalty.