Where does “disputen” come from?

disputen (Middle English) comes from Old French desputer, from Latin disputo, from Latin dis-, from Latin calceus, from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

Ancestry of “disputen”, step by step

Step	Language	Word	Meaning
1	Old French	desputer	—
2	Latin	disputo	I estimate or compute; I discuss, debate or...
3	Latin	dis-	asunder, apart, in two; reversal, removal;...
4	Latin	calceus	shoe
5	Latin	calx	limestone; chalk; the finish line
6	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Words derived from “disputen”

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