Where does “tok” come from?

tok (Old Czech) comes from Proto-Slavic tokъ, from Proto-Balto-Slavic takas, from Proto-Indo-European tekʷ- — to run, to flow.

Ancestry of “tok”, step by step

StepLanguageWordMeaning
1Proto-Slavictokъcurrent, course, stream
2Proto-Balto-Slavictakas—
3Proto-Indo-Europeantekʷ-to run, to flow

Words derived from “tok”

Every word from Proto-Indo-European tekʷ- →Every word from Proto-Balto-Slavic takas →Every word from Proto-Slavic tokъ →