Where does “девятнадцатиугольник” come from?

девятнадцатиугольник (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.

девятнадцатиугольник (Russian): enneadecagon

Definitions

  1. enneadecagon

Ancestry of “девятнадцатиугольник”, step by step

девятнадцатиугольник 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 девятна́дцать

StepLanguageWordMeaning
1Russianдевятна́дцатьnineteen (19)
2Russianдевятьnine
3Old East Slavicде́вѧтьnine
4Proto-Slavicdevętьnine
5Proto-Indo-Europeanh₁néwn̥nine
Every word from Proto-Indo-European h₂eng-Every word from Proto-Indo-European h₂engulosEvery word from Proto-Balto-Slavic *ángulas