Nonchalant

//ˌnɑn.ʃəˈlɑnt// adj

Definitions

Adjective
  1. 1
    Casually calm and relaxed.

    "We handled the whole frenetic situation with a nonchalant attitude."

  2. 2
    Indifferent; unconcerned; behaving as if detached.

    "He is far too nonchalant about such a serious matter."

Adjective
  1. 1
    marked by blithe unconcern wordnet

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”).

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