Where does “dr̥Hgʰ” come from?

dr̥Hgʰ (Proto-Indo-European) comes from Proto-Indo-European derHgʰ- — to tug, to stretch; to pluck.

Ancestry of “dr̥Hgʰ”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	derHgʰ-	to tug, to stretch; to pluck

dr̥Hgʰ — Etymology, Origin & Word History | Etymology Explorer