Where does “tis” come from?

tis (Old Czech) comes from Proto-Slavic tisъ, from Proto-Indo-European taḱs-.

Ancestry of “tis”, step by step

StepLanguageWordMeaning
1Proto-Slavictisъyew
2Proto-Indo-Europeantaḱs-—

Words derived from “tis”

Every word from Proto-Indo-European taḱs- →Every word from Proto-Slavic tisъ →