Complacent

Synonyms: Smug, pleased with oneself, self-approving, self-admiring, gloating, proud, gratified, content, careless, lax, I'm-all-right-Jack, self-satisfied, proud of oneself, self-congratulatory, self-regarding, triumphant, pleased, satisfied, contented, slack, lazy, and wisenheimer.

Example Sentences

He became complacent in his success.

Don’t be complacent about your achievements.

A complacent attitude can hinder progress.

They were complacent about the upcoming challenges.