A noun glossed “a fire, a blaze” in etymological notes from around 1964 (DD), derived from the root √RUYU “blaze (red)” (PE17/184). This word is for an individual fire in the physical world, as opposed to Q. nár for elemental fire, fire as a force or as an abstract concept.
Quenya
ruinë
fire, a blaze
ruinë
noun. fire, blaze, blaze, fire
ruina
blazing, fiery
ruina adj. "blazing, fiery" (PE17:183). Cf. ruinë.
rúcina
confused, shattered, disordered, ruined
rúcina ("k") adj. (or passive participle?) "confused, shattered, disordered, ruined" in Markirya (the first version of this poem had "red skies", MC:215, changed to "ruined skies" in the final version; see MC:220, note 8)
rúcina
adjective. confused, shattered, disordered, ruined
fanyarë
the skies
fanyarë noun "the skies" (not heaven or firmament the upper airs and clouds). Note that despite its English gloss, fanyarë is a singular word and therefore takes a singular adjective/participle, as in fanyarë rúcina "ruined skies" in Markirya (see MC:220, note 8 for this translation)
nár
flame
nár noun "flame", also nárë (NAR1).Translated "fire" in some names, see Aicanár(o), Fëanáro (where nár apparently has the masculine ending -o added to it). According to PE17:183, nár- is "fire as an element" (a concrete fire or blaze is rather called a ruinë).
nárë
flame
nárë, also short nár, noun "flame" (NAR1, Narqelion). Translated "fire" in some names, see Aicanáro, Fëanáro (where nár apparently has the masculine ending -o, though in the latter name it may also be the genitive ending since Fëa-náro** is translated "Spirit of Fire"). At one point, Tolkien mentioned "nār-" as the word for "fire (as an element)" (PE17:183). Cf. ruinë** as the word for "a fire" (a concrete instance of fire) in the same source.
sá
fire
sá noun "fire" (LT1:265; "Qenya" spelling sâ. Rather nárë in LotR-style Quenya.)
uru
fire
uru noun "fire" (LT1:271)
velca
flame
velca ("k") noun "flame" (LT1:260; nár, nárë would be the normal word in Tolkien's later Quenya)
úr
fire
úr noun "fire" (UR)This stem was struck out in Etym, but a word that must be derived from it occurs in LotR, so it seems that Tolkien restored it. Early "Qenya" also has Ûr, noun "the Sun" (also Úri, Úrinci ("k"), Urwen) (LT1:271). Cf. Úri.
ruinë noun "a fire, a blaze" (PE17:183). Compare nárë.