Where does “czterojęzyczny” come from?

czterojęzyczny (Polish) comes from Polish język, from Proto-Slavic ęzykъ, from Proto-Balto-Slavic inźūˀ-kas, from Proto-Balto-Slavic *inźūˀs, from Proto-Balto-Slavic *dinźūˀs, from Proto-Indo-European dn̥ǵʰwéh₂s — tongue.

czterojęzyczny (Polish): quadrilingual

Definitions

  1. quadrilingual

Ancestry of “czterojęzyczny”, step by step

czterojęzyczny traces back through two separate lines of ancestry.

via Polish język

StepLanguageWordMeaning
1Polishjęzyktongue; language; language, tongue
2Proto-Slavicęzykъtongue; language
3Proto-Balto-Slavicinźūˀ-kas—
4Proto-Balto-Slavic*inźūˀstongue
5Proto-Balto-Slavic*dinźūˀs—
6Proto-Indo-Europeandn̥ǵʰwéh₂stongue

via Polish cztery

StepLanguageWordMeaning
1Polishczteryfour
2Proto-Slavic*četỳrefour
3Proto-Balto-Slavicketuresfour
4Proto-Indo-Europeankʷetwóresfour
5Proto-Indo-Europeankʷe-and
Every word from Proto-Indo-European dn̥ǵʰwéh₂s →Every word from Proto-Balto-Slavic *dinźūˀs →Every word from Proto-Balto-Slavic *inźūˀs →