Where does “четырнадцатилетний” come from?

четырнадцатилетний (Russian) comes from Russian четы́рнадцать, from Russian четыре, from Old East Slavic четꙑре, from Proto-Slavic *četỳre, from Proto-Balto-Slavic ketures, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

четырнадцатилетний (Russian): fourteen-year

Definitions

  1. fourteen-year

Ancestry of “четырнадцатилетний”, step by step

четырнадцатилетний traces back through two separate lines of ancestry.

via Russian четы́рнадцать

StepLanguageWordMeaning
1Russianчеты́рнадцатьfourteen (14)
2Russianчетыреfour
3Old East Slavicчетꙑреfour
4Proto-Slavic*četỳrefour
5Proto-Balto-Slavicketuresfour
6Proto-Indo-Europeankʷetwóresfour
7Proto-Indo-Europeankʷe-and

via Russian ле́то

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