Where does “почетком” come from?

почетком (Serbo-Croatian) comes from Serbo-Croatian поче́так, from Proto-Slavic *počętъkъ.

почетком (Serbo-Croatian): at the beginning

Definitions

  1. at the beginning

Ancestry of “почетком”, step by step

StepLanguageWordMeaning
1Serbo-Croatianпоче́такbeginning
2Proto-Slavic*počętъkъ—
Every word from Proto-Slavic *počętъkъ →Every word from Serbo-Croatian поче́так →
почетком — Etymology, Origin & Word History | Etymology Explorer