Where does “popel” come from?

popel (Czech) comes from Old Czech popel, from Proto-Slavic pepelъ, from Proto-Indo-European pepelh₁-o-.

popel (Czech): ash

Definitions

Step	Language	Word	Meaning
1	Old Czech	popel	—
2	Proto-Slavic	pepelъ	ash, ashes
3	Proto-Indo-European	pepelh₁-o-	—

popel — Etymology, Origin & Word History | Etymology Explorer