cómplice
/ˈkompliθe/ · B1 · adj
accomplice
🤝 Sounds like accomplice; both come from Latin complex, folded together
From Latin complex, complicis: com- (together) + plicare (to fold). A cómplice is folded into the plan with you. As an adjective it can be warm: una mirada cómplice is a knowing look shared between friends.