Where does “zema” come from?

zema (Latin) comes from Ancient Greek ζέμα, from Ancient Greek ζέω, from Proto-Indo-European yes- — to foam; to boil.

zema (Latin): cooking utensil, saucepan

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	ζέμα	fermentation, boiling
2	Ancient Greek	ζέω	to boil, seethe, bubble; to heat
3	Proto-Indo-European	yes-	to foam; to boil