Where does “česko-slovenský” come from?

česko-slovenský (Czech) comes from Czech český, from Old Czech češský, from Old Czech Čech, from Proto-Slavic čelověkъ, from Proto-Indo-European (s)kʷel-, from Proto-Indo-European kʷel- — to turn.

česko-slovenský (Czech): Czecho-Slovak, Czecho-Slovakian

Definitions

  1. Czecho-Slovak, Czecho-Slovakian

Ancestry of “česko-slovenský”, step by step

česko-slovenský traces back through two separate lines of ancestry.

via Czech český

StepLanguageWordMeaning
1CzechčeskýCzech; Bohemian
2Old CzechčešskýCzech
3Old CzechČechCzech person
4Proto-Slavicčelověkъman, human
5Proto-Indo-European(s)kʷel-crowd, people
6Proto-Indo-Europeankʷel-to turn

via Czech slovenský

StepLanguageWordMeaning
1CzechslovenskýSlovak
Every word from Proto-Indo-European kʷel- →Every word from Proto-Indo-European (s)kʷel- →Every word from Proto-Slavic čelověkъ →