Where does “tyvisolukerros” come from?

tyvisolukerros (Finnish) comes from Finnish tyvisolu, from Finnish solu, from Finnish sola, from Swedish svala, from Old Norse svala, from Old Norse svalr, from Proto-Germanic swalaz, from Proto-Germanic swelaną — to smolder; burn; scorch; beam, board, frame,...

Ancestry of “tyvisolukerros”, step by step

tyvisolukerros traces back through two separate lines of ancestry.

via Finnish tyvisolu

StepLanguageWordMeaning
1Finnishtyvisolubasal cell
2Finnishsolucell; Short for soluasunto; Indicative present...
3Finnishsolapass, mountain pass; alley or lane, gap
4Swedishsvalaswallow
5Old Norsesvalaa swallow; to chill, cool; strong feminine...
6Old Norsesvalrcool, cold
7Proto-Germanicswalazcold
8Proto-Germanicswelanąto burn
9Proto-Indo-Europeanswel-to smolder; burn; scorch; beam, board, frame,...

via Finnish kerros

StepLanguageWordMeaning
1Finnishkerrosfloor, storey; layer; Second-person singular...
2FinnishkerrataTo repeat or reread
3Finnishkertatime, occasion; time; times; also once, when the...
4Proto-Finnickertatime
5Proto-Indo-Europeankert-times; to weave, twist together; time
6Proto-Turkic*keŕ-to travel, tour
Every word from Proto-Indo-European swel-Every word from Proto-Germanic swelanąEvery word from Proto-Germanic swalaz