n. 不诚实;背信弃义
perfidy 背叛,不忠
来自拉丁语perfidia,背叛,出卖,不忠,来自per-,整个的,-fid,相信,信任,词源同faith,confident.字面意思即完全信任,后词义讽刺化。比较perjury.
[C]ombinations of wickedness would overwhelm the world by the advantage which licentious principles afford, did not those who have long practiced perfidy grow faithless to each other. [Samuel Johnson, "Life of Waller"]