背はい信しん

noun, noun or participle which takes 'suru', noun which may take the genitive case particle 'no'

betrayal; breach of faith; infidelity

A formal word for betraying trust, loyalty, promises, or duty. Often appears as 背信行為, meaning an act of betrayal or breach of trust; the English 'infidelity' here is broad unfaithfulness rather than only a romantic sense.

• これは有ゆう権けん者しゃへの背はい信しん行こう為いだ。

  This is an act of betrayal against the voters.

• 顧こ客きゃくの情じょう報ほうを勝かっ手てに売うるのは、会かい社しゃへの背はい信しんにあたる。

  Selling customer information without permission amounts to a betrayal of the company.

• 政せい権けんは公こう約やくを破やぶり、有ゆう権けん者しゃに背はい信しんした。

  The administration broke its campaign promises and betrayed the voters.