adjective
jaunty
JAWN-tee/ˈdʒɔːnti/
Lively and cheerfully self-confident in manner or appearance.
She walks into the room with a jaunty smile.

Etymology
From gentil, “nice, pleasing,” jaunty first described someone elegant or stylish. It then shifted toward an easy, sprightly manner—the lively confidence emphasized in its current meaning.
In context
He walked with a jaunty air, and seemed to be on the best of terms with himself and the world in general.
More examples
- He wears his cap at a jaunty angle.
- A jaunty tune plays as the parade begins.
- After the good news, her step seems jauntier.
Forms
jaunty · jauntier · jauntiest
jauntily adverb — In a lively, cheerfully confident manner.
jauntiness noun — A lively, cheerfully confident manner or appearance.