nonchalant

adj

Etymology: Borrowed from French nonchalant, from Old French nonchaloir (“to be unconcerned”), from non- (“not”) + chaloir (“to have concern for”), from Latin non (“not”) + calēre (“to be warm”).

1. Casually calm and relaxed.

   “We handled the whole frenetic situation with a nonchalant attitude.”

   “On the other hand, to arrive after dusk, when the multitude of garish little public-houses are lit up, giving glimpses of crowded jostling bars and taprooms, is an introduction to a fine city well calculated to affect even the most nonchalant.”

2. Indifferent; unconcerned; behaving as if detached.

   “He is far too nonchalant about such a serious matter.”