Where does “isty” come from?

isty (Silesian) comes from Old Polish isty, from Proto-Slavic jistъ — true, genuine; same.

isty (Silesian): certain, sure

Definitions

  1. certain, sure

Ancestry of “isty”, step by step

StepLanguageWordMeaning
1Old Polishistymentioned, said, known
2Proto-Slavicjistъtrue, genuine; same
Every word from Proto-Slavic jistъ →Every word from Old Polish isty →