Where does “saippuapesu” come from?

saippuapesu (Finnish) comes from Finnish pesu, from Finnish -u, from Proto-Finnic -u — Forms nouns from adjectives, nouns.

saippuapesu (Finnish): soap wash, washing with soap

Definitions

  1. soap wash, washing with soap

Ancestry of “saippuapesu”, step by step

saippuapesu traces back through two separate lines of ancestry.

via Finnish pesu

StepLanguageWordMeaning
1Finnishpesuwash, washing
2Finnish-uForms nouns from verbs. Most common with "e"- and...
3Proto-Finnic-uForms nouns from adjectives, nouns

via Finnish saippua

StepLanguageWordMeaning
1Finnishsaippuasoap
2Proto-Germanicsaipǭsoap
3Proto-Indo-Europeanseyb-to pour, leak, trickle; to pour out, trickle,...
Every word from Proto-Finnic -u →Every word from Finnish -u →Every word from Finnish pesu →