Where does “łykustwo” come from?

łykustwo (Polish) comes from Polish Łykus, from Polish łyko, from Proto-Slavic lyko, from Proto-Balto-Slavic *lúnˀkan — bast.

Ancestry of “łykustwo”, step by step

StepLanguageWordMeaning
1PolishŁykus—
2Polishłykophloem
3Proto-Slaviclykobast
4Proto-Balto-Slavic*lúnˀkanbast
Every word from Proto-Balto-Slavic *lúnˀkan →Every word from Proto-Slavic lyko →Every word from Polish łyko →