Where does “discisus” come from?

discisus (Latin) comes from Latin discido, from Latin dis-, from Latin calceus, from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

Definitions

Ancestry of “discisus”, step by step

Step	Language	Word	Meaning
1	Latin	discido	I cut in pieces, cut up
2	Latin	dis-	asunder, apart, in two; reversal, removal;...
3	Latin	calceus	shoe
4	Latin	calx	limestone; chalk; the finish line
5	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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