Quenya name of the Nazgûl, of unclear meaning (S/296, PM/175). The first element is likely the negative prefix ú-. The second element resembles a plural form of the noun lairë “summer”, so perhaps it means “✱Un-summer”, referring to their cold and undead nature. Alternately, the second element could a derivative of an unattested primitive noun ✱lay-ro “living one” from the root √LAY (having to do with life), so that the name means “✱Un-living”. Both these derivations are quite speculative.
Quenya
un-
in evil sense
úlairi
collective name. Ring-wraiths, (lit.) ?Un-living, Un-summer
ala-
prefix. un-; -less; non-, without
il-
verb. no, *un-
il- (prefix) "no, *un-" (LA); cf. ilfirin "immortal" (vs. firin "dead"). This prefix "denotes the opposite, the reversal, i.e. more than the mere negation" (VT42:32). But il- can also mean "all, every"; see ilaurëa, ilqua, ilquen.
ú-
verb. not-, un-, in-
ú- (2) prefix "not-, un-, in-", denying presence or possession of thing or quality (VT39:14, UGU/UMU/VT46:20, GŪ, LT1:272), or simply suggesting something bad or immoral (see #úcar-, Úmaiar). Tolkien at one point considered redefining ú- as an element signifying "bad, uneasy, hard"; the already-published form únótima would then mean "difficult/impossible to count" rather than simply "uncountable" (VT42:33). However, Tolkien's very last word on the matter seems to be that ú- was to remain a mere negative (VT44:4). Compare úa, q.v. According to the Etymologies, the prefix ú- usually has a "bad sense", whereas according to early material u- (uv-, um-, un-) is a "mere negation" (UGU/UMU vs. VT42:32) According to a later source, ú- could be used as an uninflected verbal prefix, mainly in verse, but in a normal style the prefix was "verbalized" as ua-, q.v. (PE17:144). The stem Ū, as a negation, was accompanied by "pursed lips and shaking of the head" (PE17:145).
ú-
prefix. no, not, un-, in-; hard, difficult, bad, uneasy; hardly, with difficulty, ‘badly’
al(a)-
prefix. in-, un-, not; †-less, without
la-
prefix. not, in-, un-, not, in-, un-; [ᴹQ.] none, not any
úhep-
verb. to lose, (lit.) to un-keep
únet-
verb. to lose, (lit.) to un-get
untup-
verb. to cover (over or up), lie as a covering upon, (lit.) to cover down
undu
adverb. down, under, down, under, [ᴹQ.] beneath
An adverb in The Etymologies of the 1930s glossed “down, under, beneath” under the root ᴹ√UNU, parallel to amba “up(wards)” (Ety/UNU). It was also used as a prefix meaning “down, under” in unduláve “swallowed = down-licked” from the Namárië “poem” (LotR/377; PE17/72). As a prefix, it had a shorter form un(u)- as in untup- “cover down” (PE17/73) and [ᴹQ.] unutikse “under dot [in writing]” (Ety/TIK).
Conceptual Development: A rejected page of verbal roots from the Quenya Verbal System (QVS) of 1948 had ᴹQ. undu “down from on high” (prefixal form unu-) and ᴹQ. undo “down, low down”, both based on ᴹ√NDŪ (PE22/127).
ar hísië untúpa calaciryo míri oialë
and mist covers (lit. down-roofs) Calacirya’s jewels forever
The 14th phrase in the prose Namárië, which is essentially the same as its poetic version, differing only in its more literal translation. There is nothing particularly notable about its word order.
ar hísië untúpa calaciryo míri oialë
and mist covers the jewels of Calacirya forever
End of the thirteenth and the fourteenth lines @@@
un- intensive prefix used before qu; the assimilated variant um- is said to occur before p, and "b" (the latter evidently = v developed from prehistoric b, but following um- its original quality would be preserved so that we would see umb-). This prefix is reportedly only used "in evil sense"; otherwise the intensive prefix is an- (and assimilated variants thereof). (VT45:5)