úa, with 1st person suffix úalyë, imperative particle á, a combined with the negation ú- to express a prohibition (úalyë mittanya me, *"do not thou lead us", VT43:9, 21-22). However, Tolkien apparently abandoned úa in favour of ala, alalyë, q.v. (later he also used the form áva for "don't"). Compare ua.
Quenya
ua-
not do, not be
úa
do not thou lead us
ua-
verb. to not be, to not do
#uië
#uië
#uië, the perfect tense of the negative verb ua-, q.v. Only attested with a 1st person sg. pronominal suffix (uien).
u-
verb. not do, not be
#u- vb. "not do, not be" (1st pers. aorist uin "I do not, am not"), pa.t. úmë (UGU/UMU). A late (ca. 1968) source gives the forms uin, uin(yë) "I am not", uil(yë) "you are not", uis "it is not", uilmë "we are not", uir "are not" and endingless ui *"is not" (VT49:29, 36); these forms were however struck out. The example uin carë "I dont" (PE17:68) combines this negative verb with a following verb in the "simplest aorist infinitive". Compare ua in another late source. See also ui, which (despite its use as an interjection "no") seems to be the endingless 3rd person aorist.
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).
úna
deprived of, destitute, forlorn
úna adj. "deprived of, destitute, forlorn" (VT39:14). The plural form *únë is not to be confused with the pa.t. of the negative verb ua, q.v. An unglossed word úna, cited in VT49:28, rather seems to be a negated form of ná "is".
únë
únë
#únë vb., the pa.t. of ua-, q.v. Only attested with a 1st person sg. pronominal suffix: únen.
úva
will not
úva (1) vb. "will not", future tense of a negative verb (present/aorist tense úyë?) in Fíriel's Song. Compare #úva as the future tense of the negative verb ua- (q.v.) in a later source (PE17:144, where the verb is cited with a 1st person sg. ending: úvan).
lá-
verb. to not be
ui-
verb. to not be, to not do
Rása
the sea
Rása noun "the Sea" (LT2:347; rather ëar in Tolkien's later Quenya)
ó
the sea
†Ó noun "the sea" (poetic word, hardly valid in Tolkien's later Quenya) (LT1:263, there spelt Ô)
ua- negative verb "not do, not be". If a verb is to be negated, ua (coming before the verb) receives any pronominal endings (and presumably also any endings for plurality or duality, -r or -t), whereas the uninflected tense-stem of the verb follows: With the ending -n for "I", one can thus have constructions like uan carë "I do not" (aorist), uan carnë "I did not" (past), uan cára "I am not doing" (present), uan caruva "I shall not do" (future). The verb ua- can itself be fully conjugated: #ua aorist (or present?), únë (past), úva "(future), #uië (perfect) (the aorist and perfect are attested only with the ending -n "I"). In "archaic Quenya" these tense-forms could be combined with an uninflected aorist stem, e.g. future *úvan carë = later Quenya uan caruva, "I shall not do". In later Quenya, only the forms ua (present or aorist) and "occasionally" the past tense form #únë were used in normal prose (únen* "I did not, was not"). (PE17:144; compare FS for úva** as a future-tense negative verb "will not")