劣根性的英文：
scoundrelism

He dropped a warning to the Duchess and Mother Shipton, who of course knew the facts of their associate's defection
他暗中警告了公爵夫人和席浦顿妈妈。她们当然知道她们同伴的劣根性。

He is a thorough scoundrel.
他是一个十足的无赖。

He is a precious scoundrel！
他简直就是个流氓！

A thief,scoundrel,or rascal.
贼，无赖，流氓或恶棍

He played the part of contemptible scoundrel in the incident.
他在这个事件中扮演了一个跳梁小丑的角色。