Where does “десятиугольник” come from?

десятиугольник (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.

десятиугольник (Russian): decagon

Definitions

  1. decagon

Ancestry of “десятиугольник”, step by step

десятиугольник 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 де́сять

StepLanguageWordMeaning
1Russianде́сятьten
2Old Church Slavonicдесѧтьten
3Proto-Slavicdesętьten
4Proto-Balto-Slavic*déśimtten
5Proto-Indo-Europeandéḱm̥tten
Every word from Proto-Indo-European h₂eng- →Every word from Proto-Indo-European h₂engulos →Every word from Proto-Balto-Slavic *ángulas →