A Quenya translation of S. Barad-dûr (LotR/1038), a combination of taras “tower” and lúna “✱dark” (PE17/22). Tolkien did not translate the name, so this entry assume it has the same meaning as its Sindarin equivalent.
Quenya
taras
great towering building, (fort, city, castle) tower
taras
noun. a great towering building (fort/city/castle), tower, great towering building (fort/city/castle), tower; [ᴹQ.] mount, hill
taras
noun. high hill
taras lúna
place name. *Dark Tower
taras noun, Quenya equilvalent of Sindarin barad "a great towering building, (fort, city, castle) tower" (PE17:22), also tarminas. Barad-dûr (Dark Tower) = Quenya Taras Lúna (or Lúnaturco, q.v.)