Where does “nonchalantness” come from?

nonchalantness (English) comes from English nonchalant, from French nonchalant, from Old French nonchaloir, from Old French chaloir, from Old French chaleir, from Latin calēre, from Proto-Italic kalēō, from Proto-Indo-European ḱelh₁- — to warm up, to be hot; to warm up, be hot.

nonchalantness (English): nonchalance

Definitions

  1. nonchalance

Ancestry of “nonchalantness”, step by step

nonchalantness traces back through two separate lines of ancestry.

via English nonchalant

StepLanguageWordMeaning
1EnglishnonchalantCasually calm and relaxed; Indifferent;...
2FrenchnonchalantMarked by a lack of vivacity, vigour, liveliness;...
3Old Frenchnonchaloirindifference; uncaringness; to ignore; to pay...
4Old Frenchchaloirto heat; to bother, to concern
5Old FrenchchaleirAlternative form of chaloir
6Latincalēre
7Proto-Italickalēō
8Proto-Indo-Europeanḱelh₁-to warm up, to be hot; to warm up, be hot

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European ḱelh₁-Every word from Proto-Italic kalēōEvery word from Latin calēre