二ふた心ごころ

noun

duplicity; treachery; double-dealing

Refers to having a divided heart or disloyal intentions; often used in literary or formal contexts to describe betrayal or faithlessness.

• 彼かれの二ふた心ごころを見み抜ぬけなかった自じ分ぶんが悔くやしい。

  I regret that I couldn't see through his duplicity.

• 二ふた心ごころを抱いだく者ものは信しん頼らいされない。

  Those who harbor treachery are not trusted.