nonchalant
Meanings
Adjective
1. Marked by a lack of vivacity, vigour, liveliness; slow-moving; indolent
2. Cool, relaxed
Examples3
Il n'y a rien de pire que de faire quelque chose d'une manière nonchalante.
There is nothing worse than doing something in a half-hearted manner.
Son attitude nonchalante vis-à-vis des études explique ses notes médiocres.
His lackadaisical attitude to studying explains his poor grades.
Malgré son air nonchalant, elle est très attentive à tout ce que vous dites.
Despite her nonchalant air, she is paying close attention to everything you say.