Complement (KOM Pluh munt) u: to complete or fill up; to be the perfect counterpart
This word is often confused with compliment, which means to praise. It's easy to tell them apart. Complement is spelled like complete. The flower arrangement complemented the table decorations.
Complement can also be a noun. Fish-flavored ice cream was a perfect complement to the seafood dinner.
Complacent (kum PLAY sunt) adj: self-satisfied; overly pleased with oneself; contented to a fault
The complacent camper paid no attention to the bear prowling around his camp site and the bear ate him up.
The football team won so many games that it became complacent and the worst team in the league snuck up and beat it.
To fall into complacency is to become comfortably uncaring about the world around you.
The president of the student council was appalled by the complacency of his classmates; not one of the seniors seemed to care whether the theme of the prom was "you Light My Life" or “You Color My world"
Don't confuse complacent with complaisant (kum PLAY zunt) which means eager to please.