Where does “одиннадцатигранник” come from?

одиннадцатигранник (Russian) comes from Russian оди́ннадцать, from Russian оди́н, from Old East Slavic оди́нъ, from Proto-Slavic edìnъ, from Proto-Balto-Slavic edīˀnas, from Proto-Balto-Slavic aiˀnas, from Proto-Indo-European óynos — one; single.

одиннадцатигранник (Russian): hendecahedron

Definitions

  1. hendecahedron

Ancestry of “одиннадцатигранник”, step by step

одиннадцатигранник traces back through two separate lines of ancestry.

via Russian оди́ннадцать

StepLanguageWordMeaning
1Russianоди́ннадцатьeleven (11)
2Russianоди́н—
3Old East Slavicоди́нъ—
4Proto-Slavicedìnъone
5Proto-Balto-Slavicedīˀnas—
6Proto-Balto-Slavicaiˀnasone
7Proto-Indo-Europeanóynosone; single

via Russian грань

StepLanguageWordMeaning
1Russianграньface; facet, side; border, verge, brink
2Old East Slavicгрань—
3Proto-Slavicgranьside, edge
4Proto-Slavic-nьDeverbative, creates nouns
Every word from Proto-Indo-European óynos →Every word from Proto-Balto-Slavic aiˀnas →Every word from Proto-Balto-Slavic edīˀnas →