Where does “kolacho” come from?

kolacho (Polish) comes from Polish kolano, from Proto-Slavic *kolě̀no — knee.

Ancestry of “kolacho”, step by step

StepLanguageWordMeaning
1Polishkolanoknee
2Proto-Slavic*kolě̀noknee
Every word from Proto-Slavic *kolě̀no →Every word from Polish kolano →
kolacho — Etymology, Origin & Word History | Etymology Explorer