Where does “dʰewb-ṓ” come from?

dʰewb-ṓ (Proto-Indo-European) comes from Proto-Indo-European dʰewb- — deep, hollow; depths, hollow, deep, bottom.

Ancestry of “dʰewb-ṓ”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	dʰewb-	deep, hollow; depths, hollow, deep, bottom

dʰewb-ṓ — Etymology, Origin & Word History | Etymology Explorer