Where does “лавъка” come from?

лавъка (Old East Slavic) comes from Proto-Slavic lavъka, from Proto-Slavic lavà — bench.

Ancestry of “лавъка”, step by step

StepLanguageWordMeaning
1Proto-Slaviclavъka—
2Proto-Slaviclavàbench
Every word from Proto-Slavic lavà →Every word from Proto-Slavic lavъka →