Where does “zemușoară” come from?

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

Ancestry of “zemușoară”, step by step

Step	Language	Word	Meaning
1	Romanian	zeamă	juice, sap; sauce, soup, gravy, broth
2	Latin	zema	cooking utensil, saucepan
3	Ancient Greek	ζέμα	fermentation, boiling
4	Ancient Greek	ζέω	to boil, seethe, bubble; to heat
5	Proto-Indo-European	yes-	to foam; to boil

Every word from Proto-Indo-European yes- →Every word from Ancient Greek ζέω →Every word from Ancient Greek ζέμα →