S. Udûn loc. “Dark Pit”
Sindarin name of Morgoth’s fortress Q. Utumno (MR/382) translated “Dark Pit” or “Hell” (RC/297), probably a derivative of the same primitive form ✶Utupnu as its Quenya cognate (MR/69). It was also the name of a plain in Mordor (LotR/928).
Conceptual Development: In the Gnomish Lexicon from the 1910s this name was G. Udum or Uduvna (GL/74), probably derived from the same primitive root ᴱ√TUM(B)U as its (early) Quenya cognate ᴱQ. Utumna (QL/95, LT1A/Utumna). In The Etymologies from the 1930s, N. Udûn had essentially the same form and meaning as the later Sindarin name, though at this stage its primitive form was given as ᴹ✶Utubnu (Ety/TUB).
The vale in Mordor was first called N. Narch or Narch Udûn (SD/34, WR/438).
References ✧ LotRI; MRI; RC/297; SA/tum; SD/34; SDI1/Narch; TII; WRI/Narch Udûn
N. Udûn loc.
References ✧ Ety/TUB; EtyAC/TUB
|ᴹ✶Utubnu > Udūn||[utubnu] > [utubno] > [utumno] > [utumn] > [udumn] > [uduvn] > [udūn]||✧ Ety/TUB|
G. Udum loc.
References ✧ GL/74; LT1A/Utumna; QL/99