Where does “gasćáti” come from?

gasćáti (Proto-Indo-Iranian) comes from Proto-Indo-European gʷm̥sḱéti, from Proto-Indo-European gʷem- — to step.

Ancestry of “gasćáti”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	gʷm̥sḱéti	to be walking; to come, to be coming
2	Proto-Indo-European	gʷem-	to step

gasćáti — Etymology, Origin & Word History | Etymology Explorer