IPA: /kəˈnaɪvər/
KK: /kəˈnaɪvər/
A person who secretly plans or helps to do something dishonest or illegal.
The conniver plotted to deceive his friends for personal gain.
Conniver → It is formed from "con-" (meaning together) and "nivere" (from Latin "nivere", meaning to wink or to close one eye). The word describes someone who secretly collaborates or conspires with others, often in a deceitful manner.
Think of people 'together' ('con-') who are 'winking' ('nivere') at each other, suggesting they are secretly plotting or conspiring.