perfidy
noun /ˈpɜːfədi/
/ˈpɜːrfədi/
[uncountable] (literary)- unfair treatment of somebody who trusts you
synonym treachery背叛;背信弃义 - In Act 2 he learns of Giovanni’s perfidy and swears revenge.
在第二幕中,他知道了乔瓦尼的背信弃义,发誓要报仇。
词源late 16th cent.: via French from Latin perfidia, from perfidus ‘treacherous’, based on per- ‘to ill effect’ + fides ‘faith’. - In Act 2 he learns of Giovanni’s perfidy and swears revenge.