Where does “mrak” come from?

mrak (Old Czech) comes from Proto-Slavic morkъ, from Proto-Balto-Slavic *markas, from Proto-Indo-European mergʷ- — dark, coloured; to flicker; to darken; to be dark.

Ancestry of “mrak”, step by step

StepLanguageWordMeaning
1Proto-Slavicmorkъdarkness
2Proto-Balto-Slavic*markas—
3Proto-Indo-Europeanmergʷ-dark, coloured; to flicker; to darken; to be dark

Words derived from “mrak”

Every word from Proto-Indo-European mergʷ- →Every word from Proto-Balto-Slavic *markas →Every word from Proto-Slavic morkъ →