conniver
/kəˈnɪvər/Definitions
1. noun
A person who secretly plots or schemes something, especially something malicious or deceitful.
“The company’s employees were accused of being connivers who manipulated the stock prices for personal gain.”
2. verb
To plot or scheme something secretly, especially something malicious or deceitful.
“He was accused of conniving with his business partner to steal the company’s funds.”