Where does “gangrenózní” come from?

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

gangrenózní (Czech): gangrenous

Definitions

gangrenous

Ancestry of “gangrenózní”, 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 →