This root was connected to “black” and “darkness” for all of Tolkien’s life. It first appeared as unglossed ᴱ√MORO in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. móre “night” and ᴱQ. morna “black” (QL/62). In the contemporaneous Gnomish Lexicon it had derivatives like G. morn “dark, black” and G. morth “darkness” (GL/58). It appeared as ᴹ√MOR in The Etymologies of the 1930s with a similar set of derivatives (Ety/MOR) and √MOR was mentioned regularly in Tolkien’s later writings with glosses like “black, dark, darkness” (Let/308, 382; PE17/73).
Primitive elvish
dom
root. dark, dark, [ᴹ√] faint, dim
mornā
adjective. dark
mor
root. black, dark, darkness
(n)dur
root. love, feeling of special concern with, care for, or interest in things, to show special interest in things; [ᴹ√] bow down, bend (low), obey, serve; grow/be dark
Counterpart to the root √N(D)IL, this root first appeared in a marginal note from The Etymologies of the 1930s as ᴹ√NDUR or ᴹ√DUR “bow down, bend (down), obey, serve”, an elaboration of ᴹ√NDŪ “go down, sink, set (of Sun, etc.)” (Ety/NDŪ; EtyAC/NDŪ). In the Quenya Verbal System (QVS) from 1948, ᴹ√NDUR was glossed “grow, be dark”, no doubt in connection to N./S. dûr “dark” (PE22/103), but later this “dark” word was connected more directly to √NDU “under, down”. Indeed, in a 1955 letter to David Masson, Tolkien gave √(N)DUR an origin distinct from √N(D)U, basing it on an independent root √DUR “to show special interest in things” (PE17/152); there was also an unglossed and deleted root ᴹ√DUR in The Etymologies of the 1930s (EtyAC/DUR). However, in a 1967 letter to Mr. Rang, -(n)dur again meant “to serve” (Let/386).
Neo-Eldarin: For purposes of Neo-Eldarin, I think it is best to keep the connection between √NDUR “bow down = serve” and √NDU “descend”. As for the semantic distinctions between -(n)dil and -(n)dur, see the entry on the root √N(D)IL for details.
ñgol
root. dark-hued, dark-brown
In most places, Tolkien assigned the root √ÑGOL the meaning “knowledge, wisdom”, and it was the source of the tribal name of the Noldor. In one set of late notes, however, Tolkien said:
> Delete all references of Noldo to “wisdom, lore”! This characteristic only clearly seen later - the Tribal names must be early formations ... √ÑGOL = dark-hued, dark-brown ... The predominant colour of Ñoldorin hair was very dark brown (PE17/125).
The problem with this scenario is that elsewhere the root √ÑGOL is deeply associated with wisdom. Although Tolkien did not explicitly reject √ÑGOL “dark-hued, dark-brown”, this scenario is mentioned nowhere else. Nevertheless, it is possible that the Primitive Quenderin sense of ÑGOL was originally “dark-hued, dark-brown” and the root later developed the meaning “knowledge, wisdom” by association with the Noldor, replacing the older meaning. If so, perhaps the only survival of the original meaning is the word Q. ñolya “dark-haired”. Alternately, ñolya might mean “hair like the Noldor (dark)”.
ñgul
root. dark with sinister associations
A root Tolkien used to explain S. gûl “black arts, sorcery” (PE17/31), in one place describing it as a “darker” variant of √ÑGOL “dark-hued, dark-brown” in notes where Tolkien declared the name of the Noldor was not connected to wisdom (PE17/125). In the sense “dark with sinister connotations” the root √ÑGUL was also the basis for a couple Quenya words: Q. ñúla “dark, occult, mysterious” and Q. ñúlë “black arts, sorcery”. Elsewhere, though, S. gûl was derived from √ÑGOL “knowledge, wisdom” (Ety/ÑGOL; PE17/79; WJ/383), originally with the same neutral meaning as its Quenya equivalents, but:
> In S[indarin] the word gûl (equivalent of Q ñóle) had less laudatory associations, being used mostly of secret knowledge, especially such as possessed by artificers who made wonderful things; and the word became further darkened by its frequent use in the compound morgul “black arts”, applied to the delusory or perilous arts and knowledge derived from Morgoth (WJ/383).
Neo-Eldarin: I personally find this derivation of S. gûl from √ÑGOL “wisdom” to be more interesting etymologically, and prefer it over the root √ÑGUL. However, I think the Quenya words ñúla and ñúlë might be retained as loan words from Sindarin after the Noldor directly encountered the dark magic of Morgoth in Beleriand.
durnu
adjective. dark of hue
morikwende
noun. *Dark-elf, [ᴹ✶] Dark-elf
phuinē
noun. deep shadow, night shade, dark substance, vapour-like darkness, deep shadow, night shade, [ᴹ✶] night
du Reconstructed
root. dark
graw Reconstructed
root. [unglossed], [ᴹ√] dark, swart
This root appeared as a primitive form grawa serving as the basis of the word Q. roa “bear” >> “dog” in notes on monosyllabic roots from 1968 (VT47/35); a Sindarin derivative S. graw “bear” appeared in other notes written around the same time (VT47/12). Patrick Wynne suggested that in the sense “bear” grawa might be connected to the root ᴹ√GRAWA “dark, swart” from The Etymologies of the 1930s (EtyAC/GRAWA).
This root was the basis for the main Elvish words for “dusk, night”, which was established as Q. lómë in Quenya for most of Tolkien’s life. The earliest form of this root was ᴱ√LOMO in the Qenya Lexicon of the 1910s, unglossed but with various derivatives having to do with “dusk” and “shadow” (QL/55). One notable derivative was ᴱQ. lóme “dusk, gloom, darkness”, which survived in Tolkien’s later writings as “night” and in the 1910s was the basis for ᴱQ. Hisilóme/G. Hithlum “Shadowy Twilights”. Another notable derivative was G. lómin “shady, shadowy, gloomy; gloom(iness)” (GL/45) used in the name G. Dor Lómin, which in the 1910s was translated as “Land of Shadow” (LT1/112).
The “shadow” meaning of this early root seems to have transferred to ᴹ√LUM from The Etymologies of the 1930s, which served as the new basis for N. Hithlum (Ety/LUM), as opposed contemporaneous N. Dor-lómen which was redefined as “Land of Echoes (< ᴹ√LAM via Ilkorin or in later writings, via North Sindarin). The “dusk” sense was transferred to a new root ᴹ√DOM “faint, dim”, which (along with ᴹ√DOƷ) was the basis for the pair words ᴹQ. lóme/N. dû “night” (Ety/DOMO).
These two words for “night” survived in Tolkien’s later writing in both Quenya and Sindarin (Let/308; SA/dú). In notes from the 1940s Tolkien clarified that it “has no evil connotations; it is a word of peace and beauty and has none of the associations of fear or groping that, say, ‘dark’ has for us” (SD/306). The Elves were quite comfortable being under the night sky, dating back to the time when the Elves lived under the stars before the rising of the Sun and the Moon. The root √DOM reappeared in etymologies for star-words from the late 1950s or early 1960s (PE17/152). It appeared again in some very late notes from 1969 where it was glossed “dark” and served as the basis for words meaning “blind” as well as “night”, though this paragraph was rejected (PE22/153, note #50).