Where does “rikkirousku” come from?

rikkirousku (Finnish) comes from Finnish rousku, from Finnish -u, from Proto-Finnic -u — Forms nouns from adjectives, nouns.

rikkirousku (Finnish): yellowdrop milk-cap, "Lactarius chrysorrheus"

Definitions

  1. yellowdrop milk-cap, "Lactarius chrysorrheus"

Ancestry of “rikkirousku”, step by step

rikkirousku traces back through two separate lines of ancestry.

via Finnish rousku

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

via Finnish rikki

StepLanguageWordMeaning
1Finnishrikkisulfur, sulphur; broken
2Finnishrikkoato break; to violate, breach; to offend, to...
3Proto-Finnicrikkodakto break; to ruin, to mar, to damage
Every word from Proto-Finnic -u →Every word from Finnish -u →Every word from Finnish rousku →