Nonchalant
Pronunciation : Non`cha`lant"
Part of Speech : a.
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.]
Definition : Defn: Indifferent; careless; cool.
Source : Webster's Unabridged Dictionary, 1913