This is not a time to manipulate or skulk into situations sideways, attempting to give a false impression of nonchalance.
I thought his nonchalance suggested that he failed to grasp the gravity of his situation.
Authentic beauty comes when something precious is treated with nonchalance—even disrespect, perhaps even a bit of abuse.
Yet his nonchalance, his serenity—something about him—irritated her.
"Oh, yes," assented Kirkwood, with a nonchalance not entirely unassumed.
A few mornings later the same bird gave me another and more amusing exhibition of his nonchalance.
This was all said with a sort of nonchalance, which Corny did not at all like.
Joe was just sauntering through the gate, hands in pockets, nonchalance expressed in every motion.
The elder lady spoke with the nonchalance of one quite used to the process.
A twitching face belied the nonchalance that he'd attempted to throw into the words.