noun, feminine

désinvolture

/de.zɛ̃.vɔl.tyʁ/

noun, feminine/de.zɛ̃.vɔl.tyʁ/plural: désinvoltures

casual manner, casualness, flippancy, nonchalance

“avec désinvolture” — casually

Borrowed from Italian disinvoltura. By surface analysis, désinvolte + -ure.