Where does “пятна́дцать” come from?

пятна́дцать (Russian) comes from Russian пять, from Old Church Slavonic пѧть, from Proto-Slavic pętь, from Proto-Indo-European pénkʷe — five.

пятна́дцать (Russian): fifteen (15)

Definitions

  1. fifteen (15)

Ancestry of “пятна́дцать”, step by step

StepLanguageWordMeaning
1Russianпятьfive; second-person singular imperative...
2Old Church Slavonicпѧтьfive
3Proto-Slavicpętьfive
4Proto-Indo-Europeanpénkʷefive

Words derived from “пятна́дцать”

Every word from Proto-Indo-European pénkʷe →Every word from Proto-Slavic pętь →Every word from Old Church Slavonic пѧть →