Where does “pięciorka” come from?

pięciorka (Polish) comes from Polish pięcioro, from Polish pięć, from Old Polish piec, from Proto-Slavic *pȅťь, from Proto-Balto-Slavic pektis, from Proto-Indo-European pékʷ-tis, from Proto-Indo-European pekʷ-, from Proto-Indo-European h₃-ép-kʷ-.

Ancestry of “pięciorka”, step by step

StepLanguageWordMeaning
1Polishpięciorofive
2Polishpięćfive
3Old Polishpiecoven; furnace
4Proto-Slavic*pȅťь—
5Proto-Balto-Slavicpektisoven
6Proto-Indo-Europeanpékʷ-tis—
7Proto-Indo-Europeanpekʷ-to cook; to ripen
8Proto-Indo-Europeanh₃-ép-kʷ-—
Every word from Proto-Indo-European h₃-ép-kʷ- →Every word from Proto-Indo-European pekʷ- →Every word from Proto-Indo-European pékʷ-tis →