Where does “Mokroš” come from?

Mokroš (Slovak) comes from Slovak os, from Proto-Slavic osь, from Proto-Balto-Slavic aśís, from Proto-Indo-European h₂eḱs-, from Proto-Indo-European h₂eǵ- — to drive.

Ancestry of “Mokroš”, step by step

Mokroš traces back through two separate lines of ancestry.

via Slovak os

Step	Language	Word	Meaning
1	Slovak	os	axis; axle
2	Proto-Slavic	osь	axis, axle
3	Proto-Balto-Slavic	aśís	axle, axis
4	Proto-Indo-European	h₂eḱs-	axis, axle
5	Proto-Indo-European	h₂eǵ-	to drive

via Slovak mokrý

Step	Language	Word	Meaning
1	Slovak	mokrý	wet
2	Proto-Slavic	mokrъ	wet, damp
3	Proto-Balto-Slavic	*makras	—

Every word from Proto-Indo-European h₂eǵ- →Every word from Proto-Indo-European h₂eḱs- →Every word from Proto-Balto-Slavic aśís →