Where does “зимиште” come from?

зимиште (Macedonian) comes from Macedonian зима, from Proto-Slavic zimà, from Proto-Balto-Slavic źeimā́ˀ, from Proto-Indo-European ǵʰéyōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

Ancestry of “зимиште”, step by step

StepLanguageWordMeaning
1Macedonianзимаwinter, wintertime; to take; to get
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 →