mori- "dark, black" in a number of compounds (independent form morë, q.v.):Morimando "Dark Mando" = Mandos (MBAD, VT45:33), morimaitë "black-handed" (LotR3:VI ch. 6, VT49:42). Moriquendi "Dark Elves" (SA:mor, WJ:361, 373), Moringotto "Black Foe", Sindarin Morgoth, later name of Melkor. The oldest form is said to have been Moriñgotho (MR:194). In late material, Tolkien is seen to consider both Moringotto and Moricotto _("k") _as the Quenya form of the name Morgoth (VT49:24-25; Moricotto also appears in the ablative, Moricottollo). Morion "the dark one", a title of Morgoth (FS). Morifinwë "dark Finwë", masc. name; he was called Caranthir in Sindarin (short Quenya name Moryo). (PM:353) In the name Morinehtar, translated "Darkness-slayer", the initial element is defined would thus seem to signify "darkness" rather than "dark" as an adjective (see mórë). (PM:384, 385)
morna adj. "dark, black" (Letters:282, LT1:261; also used of black hair, PE17:154), or "gloomy, sombre" (MOR). Used as noun in the phrase mi…morna of someone clad "in…black" (PE17:71). In tumbalemorna (Letters:282), q.v. Pl. mornë in Markirya**(the first version of this poem had "green rocks", MC:215, changed to ondolisse mornë** "upon dark rocks" in the final version; see MC:220, note 8).
móri adj. "dark" (MC:221; this is "Qenya"; in Tolkien's later Quenya mórë, morë)
morënoun/adjective. dark, black, darkness, night, *[ᴹQ.] blackness, *[Q.] night
núla¹adjective. dark, occult, mysterious
?lóna (4) adj. "dark" (DO3/DŌ). If this is to be the cognate of "Noldorin"/Sindarin dûr, as the context seems to indicate, lóna is likely a misreading for *lóra in Tolkien's manuscript.
lúrëa adj. "dark, overcast" (LT1:259)
hróvadark, dark brown
hróva adj. "dark, dark brown", used to refer to hair (PE17:154)
hróva¹adjective. dark, dark brown (of hair)
núladark, occult, mysterious
núla ("ñ")adj. "dark, occult, mysterious" (PE17:125)
lúna adj. *"dark" in Lúnaturco and Taras Lúna, Quenya names of Barad-dûr (Dark Tower). (PE17:22). In the Etymologies, lúnë "blue" was changed by Tolkien from lúna (VT45:29).
dark, gloomy, sinister
nulladark, dusky, obscure
nulla adj. "dark, dusky, obscure" (NDUL), "secret" (DUL). See also VT45:11.