FreeVocabulary
Complacent
/kəmˈpleɪ.sənt/ adjective easyOverly satisfied with oneself or one's situation, to the point of ignoring real risks.
After years of easy wins, the champion grew complacent and lost to a far less experienced opponent.
Memory Trick
Hear it as 'complete' plus 'pleasant' — a complacent person feels things are already so complete and pleasant that there's no reason to try any harder.