Where does “sphacelus” come from?

sphacelus (English) comes from Ancient Greek σφάκελος, from Proto-Indo-European (s)penh₁- — to twist; to weave.

sphacelus (English): gangrenous part; gangrene; slough

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	σφάκελος	gangrene, caries, necrosis; spasm, convulsion,...
2	Proto-Indo-European	(s)penh₁-	to twist; to weave

sphacelus — Etymology, Origin & Word History | Etymology Explorer