Where does “pleresye” come from?

pleresye (Middle English) comes from Old French pleuresie, from Late Latin pleurisis, from Latin pleuritis, from Ancient Greek πλευρῖτῐς — pleuritis, pleurisy.

Ancestry of “pleresye”, step by step

Step	Language	Word	Meaning
1	Old French	pleuresie	pleurisy
2	Late Latin	pleurisis	—
3	Latin	pleuritis	a sharp pain in the side, pleurisy
4	Ancient Greek	πλευρῖτῐς	pleuritis, pleurisy

Every word from Ancient Greek πλευρῖτῐς →Every word from Latin pleuritis →Every word from Late Latin pleurisis →