non·cha·lant
 [non-shuh-lahnt, non-shuh-lahnt, -luh nt]
nt]
 nt]
nt]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.
 
