Where does “désarçonner” come from?

désarçonner (French) comes from French dés-, from Middle French dés-, from Old French des-, from Latin dis-, from Latin calceus, from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

désarçonner (French): to unhorse, unseat; to disconcert, to disarm

Definitions

to unhorse, unseat; to disconcert, to disarm

Ancestry of “désarçonner”, step by step

Step	Language	Word	Meaning
1	French	dés-	dis-, de-
2	Middle French	dés-	de-; dis
3	Old French	des-	de-; dis-
4	Latin	dis-	asunder, apart, in two; reversal, removal;...
5	Latin	calceus	shoe
6	Latin	calx	limestone; chalk; the finish line
7	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin dis- →Every word from Latin calx →