Where does “зимою” come from?

зимою (Ukrainian) comes from Ukrainian зима́, from Proto-Slavic zimà, from Proto-Balto-Slavic źeimā́ˀ, from Proto-Indo-European ǵʰéyōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

зимою (Ukrainian): in winter

Definitions

  1. in winter

Ancestry of “зимою”, step by step

StepLanguageWordMeaning
1Ukrainianзима́winter
2Proto-Slaviczimàwinter
3Proto-Balto-Slavicźeimā́ˀwinter
4Proto-Indo-Europeanǵʰéyōmwinter; year; frost, snow
5Proto-Indo-European-ōmemphatic suffix or postpositive particle
6Proto-Indo-European-mi—
Every word from Proto-Indo-European -mi →Every word from Proto-Indo-European -ōm →Every word from Proto-Indo-European ǵʰéyōm →