Where does “dásyuš” come from?

dásyuš (Proto-Indo-Iranian) comes from Proto-Indo-European des- — to fray, exhaust, get tired, faint, unravel.

Ancestry of “dásyuš”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	des-	to fray, exhaust, get tired, faint, unravel

dásyuš — Etymology, Origin & Word History | Etymology Explorer