Where does “тьсть” come from?

тьсть (Old Church Slavonic) comes from Proto-Slavic tьstь, from Proto-Balto-Slavic *tíśtis, from Proto-Indo-European teḱ- — to sire, beget.

тьсть (Old Church Slavonic): father-in-law, wife's father

Definitions

  1. father-in-law, wife's father

Ancestry of “тьсть”, step by step

StepLanguageWordMeaning
1Proto-Slavictьstьfather-in-law
2Proto-Balto-Slavic*tíśtis—
3Proto-Indo-Europeanteḱ-to sire, beget
Every word from Proto-Indo-European teḱ- →Every word from Proto-Balto-Slavic *tíśtis →Every word from Proto-Slavic tьstь →