! (interjection expressing refusal or prohibition, not denying facts) baw! (dont!) Prefix
Qenya
lau(me)
adverb. no, no indeed not, on the contrary
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
Noldorin
al-
prefix. no, not
mû
interjection. no
Sindarin
baw
interjection. no, don't!
ú
prefix. no, not (negative prefix or particle)
û
interjection. no
baw!
no
baw!
no
(don’t!) Prefix
gú
no, not
also ú
Quenya
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.
la
no, not
la negation "no, not" (see lá); also prefix la- as in lacarë, q.v. (VT45:25)
lá
no, not
lá (1) adv. "no, not" (LA, VT45:25) According to VT42:33, lá is the stressed form, alternating with la when the negation is unstressed. In another conceptual phase of Tolkien's, lá had the opposite meaning "yes" (VT42:32-33), but this idea is contradicted by both earlier and later material: usually lá is conceived as a negation. The negation can receive tense markers and be used as a negative verb "when [another] verb is not expressed" (VT49:13), apparently where the phrase "is not" is followed by a noun or an adjective as a predicate, or where some verb is understood, as in English "I do not" (i.e. "I do not do whatever the context indicates"). With pronominal endings la- in the aorist, e.g. lanyë "I do not, am not" (etc.) (Tolkien abandoned the form lamin.) Exemplified in the sentence melin sé apa lanyë hé *"I love him but I do not [love] him" (another person) (VT49:15). Present tense laia, past lánë, perfect alaië, future lauva.
ui
no
ui interjection "no" (originally an endingless negative verb in the 3rd person aorist: "it is not [so]"; see #u-). Apparently this is the word for "no" used to deny that something is true (compare vá, which is rather used to reject orders, or to issue negative orders). (VT49:28) Compare uito.
adv. or interj. no, not (of fact).