Where does “czeskojęzyczny” come from?

czeskojęzyczny (Polish) comes from Polish czeski, from Polish Czechy, from Polish -y, from Old Polish -y, from Proto-Slavic jь, from Proto-Balto-Slavic iś, from Old Polish ić, from Proto-Slavic jьti — to go.

czeskojęzyczny (Polish): Czech-speaking, Czechophone

Definitions

  1. Czech-speaking, Czechophone

Ancestry of “czeskojęzyczny”, step by step

czeskojęzyczny traces back through two separate lines of ancestry.

via Polish czeski

StepLanguageWordMeaning
1PolishczeskiCzech
2PolishCzechy
3Polish-ynominative plural ending of some masculine nouns;...
4Old Polish-yforms adjectives
5Proto-Slavicthis; he
6Proto-Balto-Slavicthis
7Old Polishto go
8Proto-Slavicjьtito go
9Proto-Balto-Slaviceiteito go
10Proto-Indo-Europeanh₁éytito go, to be going
11Proto-Indo-Europeanh₁ey-to go

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
Every word from Proto-Indo-European h₁ey-Every word from Proto-Indo-European h₁éytiEvery word from Proto-Balto-Slavic eitei