Where does “disguisen” come from?

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

Ancestry of “disguisen”, step by step

Step	Language	Word	Meaning
1	Old French	desguiser	Alternative form of desguisier
2	Old French	des-	de-; dis-
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

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