Where does “Dlouhy” come from?

Dlouhy (English) comes from Czech dlouhý, from Old Czech dlúhý, from Proto-Slavic dь̀lgъ, from Proto-Balto-Slavic dílˀgas, from Proto-Indo-European dl̥h₁gʰós — long.

Ancestry of “Dlouhy”, step by step

StepLanguageWordMeaning
1Czechdlouhýlong; tall
2Old Czechdlúhýlong
3Proto-Slavicdь̀lgъlong
4Proto-Balto-Slavicdílˀgaslong
5Proto-Indo-Europeandl̥h₁gʰóslong
Every word from Proto-Indo-European dl̥h₁gʰós →Every word from Proto-Balto-Slavic dílˀgas →Every word from Proto-Slavic dь̀lgъ →