Where does “ruostesuojaus” come from?

ruostesuojaus (Finnish) comes from Finnish suojaus, from Finnish suojata, from Finnish suoja, from Proto-Finnic sooja, from Russian со́я, from Dutch soja, from Japanese そい, from Japanese 醤油 — bean paste.

ruostesuojaus (Finnish): rustproofing

Definitions

  1. rustproofing

Ancestry of “ruostesuojaus”, step by step

ruostesuojaus traces back through two separate lines of ancestry.

via Finnish suojaus

StepLanguageWordMeaning
1Finnishsuojausprotection; hedge
2Finnishsuojatato protect, shield
3Finnishsuojashelter; protective covering; refuge
4Proto-Finnicsoojashelter; protection; warm
5Russianсо́яjay {{i|dialectal}}
6Dutchsojasoy
7Japaneseそい醤油 soy sauce
8Japanese醤油soy sauce
9Middle Chinese醬油
10Middle Chinesebean paste

via Finnish ruoste

StepLanguageWordMeaning
1Finnishruosterust; rusty; inessive case is sometimes better...
2Proto-Finnicroostekrust
3Proto-Germanicrustazrust
4Proto-Indo-Europeanrudʰso-red
5Proto-Indo-Europeanh₁rewdʰ-red
Every word from Middle Chinese Every word from Middle Chinese 醬油Every word from Japanese 醤油