Where does “pchajka” come from?

pchajka (Polish) comes from Polish pchać, from Proto-Slavic pьxati, from Proto-Balto-Slavic piš-, from Proto-Indo-European pis-, from Proto-Indo-European peys- — to grind, to crush.

Ancestry of “pchajka”, step by step

StepLanguageWordMeaning
1Polishpchaćto push, to shove; to push, to persuade; to stab
2Proto-Slavicpьxatito push, to shove
3Proto-Balto-Slavicpiš-—
4Proto-Indo-Europeanpis-—
5Proto-Indo-Europeanpeys-to grind, to crush
Every word from Proto-Indo-European peys- →Every word from Proto-Indo-European pis- →Every word from Proto-Balto-Slavic piš- →