Where does “ptasiątko” come from?

ptasiątko (Polish) comes from Polish ptaszę, from Polish Ptak, from Old Polish ptak, from Proto-Slavic pъtakъ, from Proto-Slavic pъta, from Proto-Indo-European peth₂- — to spread out; to fly.

Ancestry of “ptasiątko”, step by step

StepLanguageWordMeaning
1Polishptaszębird; birdling
2PolishPtakbird
3Old Polishptakbird
4Proto-Slavicpъtakъbird
5Proto-Slavicpъtabird
6Proto-Indo-Europeanpeth₂-to spread out; to fly
Every word from Proto-Indo-European peth₂- →Every word from Proto-Slavic pъta →Every word from Proto-Slavic pъtakъ →