Where does “сорокаугольник” come from?

сорокаугольник (Russian) comes from Russian у́гол, from Proto-Slavic ǫgъlъ, from Proto-Balto-Slavic *ángulas, from Proto-Indo-European h₂engulos, from Proto-Indo-European h₂eng- — curve, bend.

сорокаугольник (Russian): tetracontagon

Definitions

  1. tetracontagon

Ancestry of “сорокаугольник”, step by step

сорокаугольник traces back through two separate lines of ancestry.

via Russian у́гол

StepLanguageWordMeaning
1Russianу́голangle; corner
2Proto-Slavicǫgъlъcorner, angle
3Proto-Balto-Slavic*ángulas—
4Proto-Indo-Europeanh₂engulosjoint?
5Proto-Indo-Europeanh₂eng-curve, bend

via Russian со́рок

StepLanguageWordMeaning
1Russianсо́рокforty
2Old East Slavicсорокъa bunch of 40 sable pelts; a bunch of 40 sable...
3Proto-Slavic*sorkъclothing item
Every word from Proto-Indo-European h₂eng- →Every word from Proto-Indo-European h₂engulos →Every word from Proto-Balto-Slavic *ángulas →