My Favorite Lexicon: Debonair

Actor Cary Grant defined "debonair" by personifying it

deb·o·nair adjective \ˌde-bə-ˈner\

of a man : dressing and acting in an appealing and sophisticated way: fashionable, attractive and confident

Definition of DEBONAIR

1 - archaic:  gentle, courteous

2 - suave, urbane <a debonair performer>;  lighthearted, nonchalant

Origin of DEBONAIR

Middle English debonere, from Anglo-French deboneire, from de bon aire of good family or nature

First Known Use: 13th century

Related to DEBONAIR

Synonyms

blithe, carefree, devil-may-care, gay, happy-go-lucky, insouciant, lighthearted, lightsome, slaphappy, unconcerned

Antonyms

careworn

— Merriam-Webster