Where does “каменна река” come from?

каменна река (Bulgarian) comes from Bulgarian ка́менен, from Bulgarian ка́мен, from Proto-Slavic kamy, from Proto-Indo-European h₂éḱmō, from Proto-Indo-European h₂eḱ- — sharp.

каменна река (Bulgarian): stone run accumulation of rocks resulting from erosion, resembling a river

Definitions

  1. stone run accumulation of rocks resulting from erosion, resembling a river

Ancestry of “каменна река”, step by step

каменна река traces back through two separate lines of ancestry.

via Bulgarian ка́менен

StepLanguageWordMeaning
1Bulgarianка́мененstone, rock
2Bulgarianка́менstone, rock
3Proto-Slavickamystone
4Proto-Indo-Europeanh₂éḱmōstone
5Proto-Indo-Europeanh₂eḱ-sharp

via Bulgarian река́

StepLanguageWordMeaning
1Bulgarianрека́river
2Old Church Slavonicрещиspeak; say
3Proto-Slavicreťito say
Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European h₂éḱmō →Every word from Proto-Slavic kamy →