Webster's Revised Unabridged Dictionary · 1913

Complacent

Complacent , adjective

[Latin complacens very pleasing, present participle of complacere; com- + placere to please: compare French complaisant. See Please and compare Complaisant.]

Self-satisfied; contented; kindly; as, a complacent temper; a complacent smile.
They look up with a sort of complacent awe... to kings. — Burke