Where does “petel” come from?

petel (Slovene) comes from Proto-Slavic pětьlъ, from Proto-Slavic pěti, from Proto-Indo-European poiH-.

Ancestry of “petel”, step by step

StepLanguageWordMeaning
1Proto-Slavicpětьlъrooster, cock
2Proto-Slavicpětito sing
3Proto-Indo-EuropeanpoiH-—
Every word from Proto-Indo-European poiH- →Every word from Proto-Slavic pěti →Every word from Proto-Slavic pětьlъ →