Where does “одиннадцатилетний” come from?

одиннадцатилетний (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.

одиннадцатилетний (Russian): eleven-year

Definitions

  1. eleven-year

Ancestry of “одиннадцатилетний”, step by step

одиннадцатилетний 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 ле́то

StepLanguageWordMeaning
1Russianле́тоyear; summer, year
2Old East Slavicлѣтоtime
3Proto-Slaviclětosummer; year
4Proto-Indo-Europeanleh₁tóm—
Every word from Proto-Indo-European óynos →Every word from Proto-Balto-Slavic aiˀnas →Every word from Proto-Balto-Slavic edīˀnas →