Where does “piestrzōnek” come from?

piestrzōnek (Silesian) comes from Silesian piestrzyń, from Polish pierścień, from Proto-Slavic pьrsty, from Proto-Slavic pьrstъ, from Proto-Balto-Slavic pírštan, from Proto-Indo-European pr̥-sth₂-o-m, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “piestrzōnek”, step by step

StepLanguageWordMeaning
1Silesianpiestrzyńring
2Polishpierścieńring; ring, annulus; planetary ring
3Proto-Slavicpьrstyfinger ring; ring
4Proto-Slavicpьrstъfinger
5Proto-Balto-Slavicpírštanfinger
6Proto-Indo-Europeanpr̥-sth₂-o-mtip
7Proto-Indo-Europeanper-before, in front; first; to go through
8Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European pr̥-sth₂-o-m