“Her sincere and nonchalant attitude struck a chord with me,” he says.
Do the Brits hold a monopoly on looking this nonchalant about pending death?
I so wanted to seem brave and nonchalant, but my hands began to shake and my heart accelerated.
1734, from French nonchalant, present participle of nonchaloir "be indifferent to, have no concern for" (13c.), from non- "not" (see non-) + chaloir "have concern for," ultimately from Latin calere "be hot" (see calorie). French chaland "customer, client" is of the same origin. Related: Nonchalantly.