perfidy
n. 不诚实；不忠；背信弃义
名词复数：perfidies
近义词：dishonesty，defection，treachery，betrayal，disloyalty，deceit，duplicity，lying，treason，perfidiousness，
英英释义
Noun
- betrayal of a trust
- an act of deliberate betrayal
例句
用作名词(n.)
- All his usual formalities of perfidy were observed with scrupulous technique.他所有形式的狡诈与不忠都被极其审慎地记录下来。