Where does “spumous” come from?
spumous (English) comes from Latin spumosus, 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.
spumous (English): frothy or foamy; spumy
Ancestry of “spumous”, step by step