Where does “жиличка” come from?

жиличка (Macedonian) comes from Macedonian жила, from Proto-Slavic žila, from Proto-Indo-European gʷhīslo-, from Proto-Indo-European gʷeiH- — sinew.

Ancestry of “жиличка”, step by step

StepLanguageWordMeaning
1Macedonianжилаblood vessel, vein; sinew, tendon
2Proto-Slavicžilavein; sinew, tendon
3Proto-Indo-Europeangʷhīslo-—
4Proto-Indo-EuropeangʷeiH-sinew
Every word from Proto-Indo-European gʷeiH- →Every word from Proto-Indo-European gʷhīslo- →Every word from Proto-Slavic žila →
жиличка — Etymology, Origin & Word History | Etymology Explorer