Where does “полянка” come from?

полянка (Bulgarian) comes from Bulgarian -ка, from Proto-Slavic -ьka, from Proto-Balto-Slavic -ikaʔ, from Proto-Indo-European -ikeh₂.

Ancestry of “полянка”, step by step

StepLanguageWordMeaning
1Bulgarian-каfeminine suffix
2Proto-Slavic-ьka—
3Proto-Balto-Slavic-ikaʔ—
4Proto-Indo-European-ikeh₂—
Every word from Proto-Indo-European -ikeh₂ →Every word from Bulgarian -ка →Every word from Proto-Slavic -ьka →