complacent complacent /kəmˈpleɪsənt/

adjective

1. Contented to a fault with oneself or one's actions  ( complacent , self-complacent , self-satisfied )
   contented to a fault with oneself or one's actions
    He had become complacent after years of success
   he had become complacent after years of success
    His self-satisfied dignity
   his self-satisfied dignity