Where does “spume” come from?

spume (Middle English) comes from Old French espume, from Latin spūma, from Proto-Indo-European (s)poHy-m-os, from Proto-Indo-European (s)poH(y)-, from Proto-Indo-European speh₁- — to succeed, to prosper.

Ancestry of “spume”, step by step

Step	Language	Word	Meaning
1	Old French	espume	foam
2	Latin	spūma	—
3	Proto-Indo-European	(s)poHy-m-os	—
4	Proto-Indo-European	(s)poH(y)-	foam
5	Proto-Indo-European	speh₁-	to succeed, to prosper

Every word from Proto-Indo-European speh₁- →

spume — Etymology, Origin & Word History | Etymology Explorer