Where does “пьрсть” come from?

пьрсть (Old East Slavic) comes from Proto-Slavic pь̑rstь, from Proto-Indo-European pers- — to sprinkle, to spatter.

Ancestry of “пьрсть”, step by step

StepLanguageWordMeaning
1Proto-Slavicpь̑rstьdust, earth
2Proto-Indo-Europeanpers-to sprinkle, to spatter
Every word from Proto-Indo-European pers- →Every word from Proto-Slavic pь̑rstь →