non·cha·lant
[non-shuh-lahnt, non-shuh-lahnt, -luhnt]
Origin:
< French nonchalant, present participle of obsoletenonchaloir to lack warmth (of heart), be
< French nonchalant, present participle of obsoletenonchaloir to lack warmth (of heart), be
indifferent, equivalent tonon- non- + chaloir < Latin calēre to be warm.
Related forms
non·cha·lant·ly, adverb
Synonyms
cool, calm, collected, composed.
Antonyms
excitable.