Earliest name (rejected) for S. Morannon (WR/113), a combination of the plural of annon “gate” and dûr “dark”.
Noldorin
dûr
masculine name. Dûr
dûr
adjective. dark
dûr
adjective. dark, sombre
ennyn dûr
proper name. Gates of Mordor
barad-dûr
place name. Dark Tower
The pure Noldorin name for Ilk. Dior (EtyAC/NDEW), where the primitive diphthong [[on|[eu] became [ū]]], as opposed to Ilkorin where the [[ilk|[eu] became [io]]].