nonchalant
UK /ˈnɒn.ʃəl.ənt/ · US /ˌnɑn.ʃəˈlɑnt/ adjective
- adjective Casually calm and relaxed. “We handled the whole frenetic situation with a nonchalant attitude.”
- adjective Indifferent; unconcerned; behaving as if detached. “He is far too nonchalant about such a serious matter.”
Synonyms
carefree blasé cool mellow easygoing unconcerned casual insouciant
Antonyms
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”).
Webster’s 1913
- adjective Indifferent; careless; cool.
Etymology [F., fr. non not (L. non) + chaloir to concern one's self for, fr. L. calere to be warm, to be inflamed with desire, to be troubled. See Non-, and Caldron.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “nonchalant”, CC BY-SA 4.0. Details