Where does “кос” come from?

кос (Bulgarian) comes from Proto-Slavic kǫsъ, from Proto-Slavic kǫsati, from Proto-Slavic kǫ̑sъ — piece.

кос (Bulgarian): blackbird

Definitions

  1. blackbird

Ancestry of “кос”, step by step

StepLanguageWordMeaning
1Proto-Slavickǫsъpiece
2Proto-Slavickǫsatito bite
3Proto-Slavickǫ̑sъpiece
Every word from Proto-Slavic kǫ̑sъ →Every word from Proto-Slavic kǫsati →Every word from Proto-Slavic kǫsъ →