Where does “jsme” come from?

jsme (Czech) comes from Old Czech jsme, from Proto-Slavic *esmъ.

Ancestry of “jsme”, step by step

StepLanguageWordMeaning
1Old Czechjsme—
2Proto-Slavic*esmъ—
Every word from Proto-Slavic *esmъ →Every word from Old Czech jsme →
jsme — Etymology, Origin & Word History | Etymology Explorer