Where does “gangrenar” come from?

gangrenar (Catalan) comes from Italian gangrena, from Latin gangraena, from Ancient Greek γάγγραινα, from Ancient Greek γράω, from Proto-Indo-European *gres-.

gangrenar (Catalan): to gangrene cause gangrene

Definitions

to gangrene cause gangrene

Ancestry of “gangrenar”, step by step

Step	Language	Word	Meaning
1	Italian	gangrena	Alternative form of cancrena
2	Latin	gangraena	gangrene
3	Ancient Greek	γάγγραινα	gangrene
4	Ancient Greek	γράω	to gnaw, eat
5	Proto-Indo-European	*gres-	—

Every word from Proto-Indo-European *gres- →Every word from Ancient Greek γράω →Every word from Ancient Greek γάγγραινα →