complaisant: \-s^ənt, -z^ənt, -ˈzant, -ˈzänt\

willing to please; marked by an inclination to please.

Naina is ready with her complaisant smile, when it comes to getting her things done.


complacent: \kəm-ˈplā-s^ənt\

smug & self-satisfied;

The teacher always tells her students not to be complacent with their performance.