Where does “chaud” come from?

chaud (Lorrain) comes from Old French chaut, from Latin calidus, from Latin caleō, from Proto-Italic kalēō, from Proto-Indo-European ḱelh₁- — to warm up, to be hot; to warm up, be hot.

chaud (Lorrain): hot

Definitions

Ancestry of “chaud”, step by step

Step	Language	Word	Meaning
1	Old French	chaut	hot; hot; heat
2	Latin	calidus	warm, hot; fiery, fierce, vehement; spirited,...
3	Latin	caleō	to be warm or hot, glow
4	Proto-Italic	kalēō	—
5	Proto-Indo-European	ḱelh₁-	to warm up, to be hot; to warm up, be hot

Every word from Proto-Indo-European ḱelh₁- →Every word from Proto-Italic kalēō →Every word from Latin caleō →