Where does “Československo” come from?

Československo (Slovak) comes from Slovak český, from Slovak -ský, from Proto-Slavic -ьskъ, from Proto-Indo-European -iskos — Characteristic of, typical of, pertaining to.

Ancestry of “Československo”, step by step

Československo traces back through two separate lines of ancestry.

via Slovak český

StepLanguageWordMeaning
1SlovakčeskýCzech; Bohemian
2Slovak-ský-ian
3Proto-Slavic-ьskъ-ic, -ish
4Proto-Indo-European-iskosCharacteristic of, typical of, pertaining to

via Slovak Slovensko

StepLanguageWordMeaning
1SlovakSlovensko—
2Old Church SlavonicсловѣнеSlavs
Every word from Proto-Indo-European -iskos →Every word from Slovak -ský →Every word from Proto-Slavic -ьskъ →