If you describe someone as conniving, you mean you dislike them because they make secret plans in order to get things for themselves or harm other people.
例句
Edith was seen as a conniving, greedy woman.人们认为伊迪丝是一个诡计多端的贪婪女人。
英英词典释义
Adjective
1. acting together in secret toward a fraudulent or illegal end
2. used of persons;
"the most calculating and selfish men in the community"