Where does “gumma” come from?

gumma (Latin) comes from Latin cummi, from Ancient Greek κόμμι, from Egyptian qmy — anointing oil.

Ancestry of “gumma”, step by step

Step	Language	Word	Meaning
1	Latin	cummi	Alternative form of cummis
2	Ancient Greek	κόμμι	gum, obtained from babul
3	Egyptian	qmy	anointing oil