Where does “rajaiskierukka” come from?

rajaiskierukka (Finnish) comes from Finnish rajaiset, from Finnish raja, from Old East Slavic краи, from Proto-Slavic krajь, from Proto-Slavic krojiti, from Proto-Balto-Slavic krájīˀtei, from Proto-Indo-European kroyh₁-eye-ti, from Proto-Indo-European kroyh₁- — to sift, to separate.

Ancestry of “rajaiskierukka”, step by step

rajaiskierukka traces back through two separate lines of ancestry.

via Finnish rajaiset

StepLanguageWordMeaning
1Finnishrajaisettailings e.g. in a combine harvester
2Finnishrajaborder, boundary, limit, line line or frontier area separating political or geographical regions
3Old East Slavicкраиedge; land, country
4Proto-Slavickrajьedge, end
5Proto-Slavickrojitito cut
6Proto-Balto-Slavickrájīˀtei
7Proto-Indo-Europeankroyh₁-eye-ti
8Proto-Indo-Europeankroyh₁-
9Proto-Indo-Europeankroh₁y-
10Proto-Indo-Europeankreh₁y-to sift, to separate

via Finnish kierukka

StepLanguageWordMeaning
1Finnishkierukkacoil; scroll
2Finnishkierätoo twisted
3Proto-Finnickeerätwisted
4Proto-Uralickerä
Every word from Proto-Indo-European kreh₁y-Every word from Proto-Indo-European kroh₁y-Every word from Proto-Indo-European kroyh₁-