Where does “nonchalant” come from?

Nonchalant comes from French nonchalant, from Old French nonchaloir meaning to not care, from Latin non combined with caleo meaning to be warm or to matter.

nonchalant (English): Casually calm and relaxed; Indifferent;...

Definitions

  1. Casually calm and relaxed; Indifferent;...

Ancestry of “nonchalant”, step by step

StepLanguageWordMeaning
1FrenchnonchalantMarked by a lack of vivacity, vigour, liveliness;...
2Old Frenchnonchaloirindifference; uncaringness; to ignore; to pay...
3Old Frenchchaloirto heat; to bother, to concern
4Old FrenchchaleirAlternative form of chaloir
5Latincalēre
6Proto-Italickalēō
7Proto-Indo-Europeanḱelh₁-to warm up, to be hot; to warm up, be hot

Words derived from “nonchalant

Every word from Proto-Indo-European ḱelh₁-
nonchalant — Etymology, Origin & Word History | Etymology Explorer