ᴹ√DEN root. “hole, gap, passage”
A (Noldorin-only?) root in The Etymologies of the 1930s glossed “hole, gap, passage” with the derivative dîn “opening, gap, pass in mountains” (< *dēnǝ) which is an element in a couple names from The Etymologies but appearing nowhere else (Ety/DEN).
Reference ✧ Ety/DEN ✧ “hole, gap, passage”
Derivatives