Where does “écumeux” come from?

écumeux (French) comes from French -eux, from French goitre, from Old French goitron, from Vulgar Latin gutturio, from Latin guttur, from Proto-Indo-European gut- — rounding, swelling; entrails, stomach; swelling,...

écumeux (French): frothy, foamy; scummy

Definitions

frothy, foamy; scummy

Ancestry of “écumeux”, step by step

Step	Language	Word	Meaning
1	French	-eux	-ous, -y
2	French	goitre	goitre
3	Old French	goitron	throat; neck; goitre
4	Vulgar Latin	gutturio	—
5	Latin	guttur	throat, neck, gullet; gluttony
6	Proto-Indo-European	gut-	rounding, swelling; entrails, stomach; swelling,...

Every word from Proto-Indo-European gut- →Every word from French -eux →Every word from Latin guttur →