Where does “Ptaś” come from?

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

Ancestry of “Ptaś”, step by step

StepLanguageWordMeaning
1Polishptakbird; cock, penis
2Proto-Slavicpъtakъbird
3Proto-Slavicpъtabird
4Proto-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 →