不ふ信しん義ぎ

noun

faithlessness; insincerity

Refers to a lack of good faith, trustworthiness, or sincerity, often in moral or interpersonal contexts.

• 彼かれの不ふ信しん義ぎな行こう動どうに失しつ望ぼうした。

  I was disappointed by his faithless behavior.