Where does “prostoročas” come from?

prostoročas (Czech) comes from Czech čas, from Old Czech čas, from Proto-Slavic časъ, from Proto-Balto-Slavic keʔs-, from Proto-Indo-European k(ʷ)eh₁s-.

prostoročas (Czech): spacetime

Definitions

  1. spacetime

Ancestry of “prostoročas”, step by step

prostoročas traces back through two separate lines of ancestry.

via Czech čas

StepLanguageWordMeaning
1Czechčastime; tense
2Old Czechčastime
3Proto-Slavicčasъtime
4Proto-Balto-Slavickeʔs-—
5Proto-Indo-Europeank(ʷ)eh₁s-—

via Czech prostor

StepLanguageWordMeaning
1Czechprostorspace
2Proto-Slavicprostorъspace, expanse
Every word from Proto-Indo-European k(ʷ)eh₁s- →Every word from Proto-Balto-Slavic keʔs- →Every word from Proto-Slavic časъ →