The board viewed the manager's leak of merger plans as an act of treachery.

董事會認為經理洩漏合併計畫是一種背叛行為。

Several employees accused the former partner of treachery after he took clients to a rival firm.

前合夥人把客戶帶到競爭公司後，好幾位員工指控他背信棄義。

The customer felt the hidden fees were a kind of treachery by the travel agency.

那位顧客覺得隱藏費用是旅行社對她的一種背叛。