Where does “dʰewbʰ-nós” come from?

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

Ancestry of “dʰewbʰ-nós”, step by step

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

dʰewbʰ-nós — Etymology, Origin & Word History | Etymology Explorer