Where does “samowarek” come from?

samowarek (Polish) comes from German Samowar, from Russian самова́р, from Russian само́-, from Russian сам, from Old East Slavic самъ, from Proto-Slavic samъ, from Proto-Balto-Slavic *sāmas, from Proto-Indo-European somHós — together, one.

Ancestry of “samowarek”, step by step

StepLanguageWordMeaning
1GermanSamowarsamovar
2Russianсамова́рself-boiler
3Russianсамо́-self-
4Russianсамself, -self
5Old East Slavicсамъself, oneself, alone
6Proto-Slavicsamъself, oneself
7Proto-Balto-Slavic*sāmas—
8Proto-Indo-EuropeansomHóssame, alike
9Proto-Indo-Europeansem-together, one
Every word from Proto-Indo-European sem- →Every word from Proto-Indo-European somHós →Every word from Proto-Balto-Slavic *sāmas →