Where does “mazati” come from?

mazati (Old Czech) comes from Proto-Slavic màzati, from Proto-Indo-European meh₂ǵ- — to knead, stroke.

Ancestry of “mazati”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	màzati	to oil, to anoint, to smear; to oil, to smear, to...
2	Proto-Indo-European	meh₂ǵ-	to knead, stroke

mazati — Etymology, Origin & Word History | Etymology Explorer