Where does “zemup” come from?

zemup (Latvian) comes from Latvian zeme, from Proto-Balto-Slavic źemē, from Proto-Indo-European ǵʰðʰem-, from Proto-Indo-European dʰéǵʰōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

zemup (Latvian): down, downward, downcast, toward the earth

Definitions

down, downward, downcast, toward the earth

Ancestry of “zemup”, step by step

Step	Language	Word	Meaning
1	Latvian	zeme	ground, land, mainland; earth, soil, ground;...
2	Proto-Balto-Slavic	źemē	earth
3	Proto-Indo-European	ǵʰðʰem-	—
4	Proto-Indo-European	dʰéǵʰōm	earth
5	Proto-Indo-European	-ōm	emphatic suffix or postpositive particle
6	Proto-Indo-European	-mi	—

Every word from Proto-Indo-European -mi →Every word from Proto-Indo-European -ōm →Every word from Proto-Indo-European dʰéǵʰōm →