Where does “tundrarousku” come from?

tundrarousku (Finnish) comes from Finnish tundra, from Russian ту́ндра, from Kildin Sami тӯннтрэ, from Kildin Sami тӯнтар, from Proto-Samic tuontër — fell.

tundrarousku (Finnish): A milk-cap, Lactarius lanceolatus

Definitions

A milk-cap, Lactarius lanceolatus

Ancestry of “tundrarousku”, step by step

tundrarousku traces back through two separate lines of ancestry.

via Finnish tundra

Step	Language	Word	Meaning
1	Finnish	tundra	tundra flat and treeless arctic biome
2	Russian	ту́ндра	tundra
3	Kildin Sami	тӯннтрэ	—
4	Kildin Sami	тӯнтар	fell; fjeld
5	Proto-Samic	tuontër	fell

via Finnish rousku

Step	Language	Word	Meaning
1	Finnish	rousku	A milk-cap
2	Finnish	-u	Forms nouns from verbs. Most common with "e"- and...
3	Proto-Finnic	-u	Forms nouns from adjectives, nouns

Every word from Proto-Samic tuontër →Every word from Kildin Sami тӯнтар →Every word from Kildin Sami тӯннтрэ →