Where does “koštac” come from?

koštac (Serbo-Croatian) comes from Serbo-Croatian kȏst, from Proto-Slavic kostь, from Proto-Indo-European kost-.

Ancestry of “koštac”, step by step

StepLanguageWordMeaning
1Serbo-Croatiankȏstbone
2Proto-Slavickostьbone
3Proto-Indo-Europeankost-—
Every word from Proto-Indo-European kost- →Every word from Proto-Slavic kostь →Every word from Serbo-Croatian kȏst →