Where does “kolenko” come from?

kolenko (Upper Sorbian) comes from Upper Sorbian koleno, from Proto-Slavic *kolě̀no — knee.

Ancestry of “kolenko”, step by step

StepLanguageWordMeaning
1Upper Sorbiankolenoknee
2Proto-Slavic*kolě̀noknee
Every word from Proto-Slavic *kolě̀no →Every word from Upper Sorbian koleno →