Where does “kupsko” come from?

kupsko (Polish) comes from Polish kupa, from Proto-Slavic kupa, from Proto-Indo-European keup-, from Proto-Indo-European keu- — bend; vault, hole; to shine; light; bright.

Ancestry of “kupsko”, step by step

StepLanguageWordMeaning
1Polishkupaheap; poo; group, crowd
2Proto-Slavickupaheap, pile
3Proto-Indo-Europeankeup-to arch, bend, buckle; a hollow
4Proto-Indo-Europeankeu-bend; vault, hole; to shine; light; bright
Every word from Proto-Indo-European keu- →Every word from Proto-Indo-European keup- →Every word from Proto-Slavic kupa →