Where does “eczema” come from?

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

eczema (Portuguese): eczema acute or chronic inflammation of the skin

Definitions

eczema acute or chronic inflammation of the skin

Ancestry of “eczema”, step by step

Step	Language	Word	Meaning
1	Latin	eczema	eczema
2	Ancient Greek	ἔκζεμα	cutaneous eruption, an eczema
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 →