Where does “dérw-o-m” come from?

dérw-o-m (Proto-Indo-European) comes from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

Ancestry of “dérw-o-m”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	dóru	tree
2	Proto-Indo-European	drew-	hard, firm, strong, solid; hard, fast; tree

dérw-o-m — Etymology, Origin & Word History | Etymology Explorer