Where does “suojuspuusto” come from?

suojuspuusto (Finnish) comes from Finnish suojus, from Finnish suoja, from Proto-Finnic sooja, from Russian со́я, from Dutch soja, from Japanese そい, from Japanese 醤油, from Middle Chinese 醬油 — bean paste.

Ancestry of “suojuspuusto”, step by step

suojuspuusto traces back through two separate lines of ancestry.

via Finnish suojus

StepLanguageWordMeaning
1Finnishsuojusguard, protection, cover, veil; pad; sheath
2Finnishsuojashelter; protective covering; refuge
3Proto-Finnicsoojashelter; protection; warm
4Russianсо́яjay {{i|dialectal}}
5Dutchsojasoy
6Japaneseそい醤油 soy sauce
7Japanese醤油soy sauce
8Middle Chinese醬油
9Middle Chinesebean paste

via Finnish puusto

StepLanguageWordMeaning
1FinnishpuustoThe trees of an area collectively; the forest...
2Russianпусто́йfutile
3Old East Slavicпоустъ
4Proto-Slavicpȗstъdesolate; empty
Every word from Middle Chinese Every word from Middle Chinese 醬油Every word from Japanese 醤油
suojuspuusto — Etymology, Origin & Word History | Etymology Explorer