Where does “čtyřúhelník” come from?

čtyřúhelník (Czech) comes from Czech čtyři, from Old Czech [[čtyřie]], [[čtyři]], from Proto-Slavic četyre, from Proto-Balto-Slavic ketures, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

čtyřúhelník (Czech): quadrilateral

Definitions

  1. quadrilateral

Ancestry of “čtyřúhelník”, step by step

čtyřúhelník traces back through two separate lines of ancestry.

via Czech čtyři

StepLanguageWordMeaning
1Czechčtyřifour
2Old Czech[[čtyřie]], [[čtyři]]—
3Proto-Slavicčetyrefour
4Proto-Balto-Slavicketuresfour
5Proto-Indo-Europeankʷetwóresfour
6Proto-Indo-Europeankʷe-and

via Czech úhel

StepLanguageWordMeaning
1Czechúhelangle
2Proto-Slavicǫglьcoal
3Proto-Balto-Slavicanˀglíscoal, charcoal
4Proto-Indo-Europeanh₁óngʷl̥charcoal
5Proto-Indo-Europeanh₁engʷ-to burn; fire
Every word from Proto-Indo-European kʷe- →Every word from Proto-Indo-European kʷetwóres →Every word from Proto-Balto-Slavic ketures →