Where does “zmeja” come from?

zmeja (Karelian) comes from Russian змея́, from Proto-Slavic zmьja, from Proto-Indo-European dʰéǵʰōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

Ancestry of “zmeja”, step by step

StepLanguageWordMeaning
1Russianзмея́snake, serpent
2Proto-Slaviczmьjasnake
3Proto-Indo-Europeandʰéǵʰōmearth
4Proto-Indo-European-ōmemphatic suffix or postpositive particle
5Proto-Indo-European-mi—
Every word from Proto-Indo-European -mi →Every word from Proto-Indo-European -ōm →Every word from Proto-Indo-European dʰéǵʰōm →