A verb in The Etymologies of the 1930s for “kindle” derived from the root ᴹ√NARTA of the same meaning (EtyAC/NARTA). This root is probably just a causative verb formation from ᴹ√NAR “flame, fire”, more literally “✱make fire”. Hence I think this verb can be used in the general sense of “✱ignite, inflame, set fire to”, etc.
Qenya
fire
noun. mortal man
faire
noun. radiance
narta-
verb. to kindle, to kindle, *ignite, inflame, set fire to
úr
noun. fire, heat
The word ᴹQ. úr “fire” appeared in The Etymologies of the 1930s under the root ᴹ√UR “be hot”, but this word was deleted when Tolkien revised the meaning of the root to “wide, large, great” (Ety/UR). However, the root √UR “heat” reappeared in later writings (PE22/160), and úr “fire” appeared in The Feanorian Alphabet of the 1930s as the name of tengwa #36 [.] (PE22/23). It reappeared again in the version of that document from the 1940s, but with the gloss “fire, heat” (PE22/51). In the 1st edition of The Lord of the Rings, the name of tengwa #36 was úr “heat” (RC/736), revised in the 2nd edition to Q. úrë “heat” (LotR/1123).
Conceptual Development: The earliest precursor of ᴹQ. úr “fire” was ᴱQ. uru “fire” from the Qenya Lexicon of the 1910s under the early root ᴱ√URU (QL/98).
Neo-Quenya: Based on the development of the names for tengwa #36, it seems 1930s úr “fire” >> 1940s úr “fire, heat” >> 1950s úr “heat” >> 1960s úre “heat”. However, the introduction of Q. úrë “heat” might mean that úr could once again be used for “fire”, and this has long been a popular word in Neo-Quenya. I would retain úr for that purpose, as it also allows us to salvage several fire-related related adjectives. It is possible, though, that the root √UR was restricted to “heat” and can no longer be used for “fire”.
narqelion
noun. Fire-fading, Autumn
narvinye
noun. January, *New-fire
nárie
noun. June, *Fire-ness
urulóke
noun. fire-dragon
uruite
adjective. fiery
A word in The Etymologies of the 1930s glossed “fiery”, an adjectival form of ᴹQ. úr “fire” under the root ᴹ√UR “be hot”, but these words were deleted when the meaning of the root was revised to “wide, large, great” (Ety/UR).
Conceptual Development: A similar word ᴱQ. uruvoite “fiery, having fire” appeared in the Qenya Lexicon under the early root ᴱ√URU (QL/98).
Neo-Quenya: The word úr “fire” was restored in some later writings, and this adjective may have been restored with it, but I prefer ᴺQ. úruva for “fiery”; see that entry for discussion.
úruva
adjective. fiery
A word in The Etymologies of the 1930s appearing as ᴹQ. úruva “fiery”, an adjectival form of ᴹQ. úr “fire” under the root ᴹ√UR “be hot”, but these words were deleted when the meaning of the root was revised to “wide, large, great” (Ety/UR).
Conceptual Development: The word ᴱQ. urūva “like fire” also appeared in the Qenya Lexicon of the 1910s under the early root ᴱ√URU (QL/98).
Neo-Quenya: The word úr “fire” was restored in some later writings, and this adjective may have been restored with it. I personally would use ᴺQ. úruva “fiery” for purposes of Neo-Quenya. See the entry on ᴹQ. úr for further discussion on the viability of “fire” words based on √UR.
anar
noun. Sun
nár(e)
noun. flame
kala
noun. light
kalina
adjective. light
kulo
noun. flame
A word for “flame” in The Etymologies of the 1930s under the root ᴹ√KUL “golden-red”, but this word was deleted (EtyAC/KUL).
rauko
noun. demon
A noun in The Etymologies of the 1930s glossed “mortal man” derived from the root ᴹ√PHIR (Ety/PHIR).