Where does “zmijka” come from?

zmijka (Lower Sorbian) comes from Lower Sorbian zmija, from Proto-Slavic zmьja, from Proto-Indo-European dʰéǵʰōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

Ancestry of “zmijka”, step by step

StepLanguageWordMeaning
1Lower Sorbianzmijaviper, adder; common European adder, cross adder
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 →