Where does “merenvaahto” come from?

merenvaahto (Ingrian) comes from Finnish vaahto, from Proto-Finnic vakto, from Proto-Germanic þwahtuz, from Proto-Germanic -þuz, from Proto-Indo-European -tus — Derives action nouns from verb roots.

merenvaahto (Ingrian): seafoam

Definitions

  1. seafoam

Ancestry of “merenvaahto”, step by step

merenvaahto traces back through two separate lines of ancestry.

via Finnish vaahto

StepLanguageWordMeaning
1Finnishvaahtofoam; head; mousse
2Proto-Finnicvaktofoam
3Proto-Germanicþwahtuzwashing, laundry
4Proto-Germanic-þuzForms result nouns from verb roots, usually from...
5Proto-Indo-European-tusDerives action nouns from verb roots

via Ingrian meri

StepLanguageWordMeaning
1Ingrianmerisea
2Proto-Finnicmerisea
3Proto-Indo-Europeanmórisea; standing water
4Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland
Every word from Proto-Indo-European -tus →Every word from Proto-Germanic -þuz →Every word from Proto-Germanic þwahtuz →