Where does “koivurousku” come from?

koivurousku (Finnish) comes from Finnish Koivu, from Finnish koivu, from Proto-Finnic koivu, from Proto-Uralic kojwa — birch.

koivurousku (Finnish): A milk-cap, Lactarius resimus

Definitions

  1. A milk-cap, Lactarius resimus

Ancestry of “koivurousku”, step by step

koivurousku traces back through two separate lines of ancestry.

via Finnish Koivu

StepLanguageWordMeaning
1FinnishKoivubirch deciduous tree of the genus
2Finnishkoivubirch
3Proto-Finnickoivubirch
4Proto-Uralickojwabirch

via Finnish rousku

StepLanguageWordMeaning
1FinnishrouskuA milk-cap
2Finnish-uForms nouns from verbs. Most common with "e"- and...
3Proto-Finnic-uForms nouns from adjectives, nouns
Every word from Proto-Uralic kojwa →Every word from Proto-Finnic koivu →Every word from Finnish koivu →