Where does “тринадцатилетие” come from?

тринадцатилетие (Russian) comes from Russian трина́дцать, from Russian три, from Macedonian трие, from Proto-Slavic trьje, from Proto-Balto-Slavic tríjes, from Proto-Indo-European *tréyes.

тринадцатилетие (Russian): thirteen-year period

Definitions

  1. thirteen-year period

Ancestry of “тринадцатилетие”, step by step

тринадцатилетие traces back through two separate lines of ancestry.

via Russian трина́дцать

StepLanguageWordMeaning
1Russianтрина́дцатьthirteen (13)
2Russianтриthree; second-person singular imperative...
3Macedonianтриеto rub
4Proto-Slavictrьjethree
5Proto-Balto-Slavictríjesthree
6Proto-Indo-European*tréyes—

via Russian ле́то

StepLanguageWordMeaning
1Russianле́тоyear; summer, year
2Old East Slavicлѣтоtime
3Proto-Slaviclětosummer; year
4Proto-Indo-Europeanleh₁tóm—
Every word from Proto-Indo-European *tréyes →Every word from Proto-Balto-Slavic tríjes →Every word from Proto-Slavic trьje →