engwë noun "thing" (VT39:7, VT49:28). Extrapolation may also point to *engwë as an emphatic dual inclusive pronoun "we" (thou and I), corresponding to the ending -ngwë.
Quenya
engwë
noun. thing [that exists]
engwë
thing
lingwë
noun. fish
A word for “fish” appearing in its plural form lingwi “fish” in notes on The Lands and Beasts of Númenor from 1965 (NM/336) and appearing as ᴹQ. lingwe “fish” from primitive ᴹ✶liñwi under the root ᴹ√LIW in The Etymologies of the 1930s (Ety/LIW).
Conceptual Development: Tolkien had ᴱQ. ingwe “fish” under the early root ᴱ√IWI “fish” in the Qenya Lexicon of the 1910s (QL/43), and this word was also mentioned in the Poetic and Mythological Words of Eldarissa (PME/43). The word {engwe >>} ingwe appeared unglossed in Early Qenya Word-lists of the 1920s (PE16/145). ᴹQ. lingwe “fish” with initial l first emerged in The Etymologies of the 1930s, as noted above.
lingwë
fish
lingwë (stem *lingwi-, given the primitive form ¤liñwi) noun "fish" (LIW)
elvë
pronoun. we (emphatic inclusive)
ilmë
pronoun. we (emphatic inclusive)
nat
thing
nat noun "thing" (NĀ2); compare únat. VT49:30 lists "năta, nat", but it is unclear whether năta is here a Quenya word or an etymological form underlying Quenya nat.
nat
noun. thing, thing, [ᴹQ.] object
The usual Quenya noun for “thing” derived from the root √NĀ “be, exist” (VT49/30, Ety/NĀ²), so perhaps prehistorically simply “a thing that is”. Its plural form nati is indirectly attested in the plural únati of its (strong) negation únat “a thing impossible to be or to be done” (VT39/26).
Conceptual Development: This word is well established in Tolkien’s writings, appearing all the way back in the Qenya Lexicon from the 1910s (QL/64). In its earliest iteration, its stem form was natt- and its plural was natsi, where [[eq|[ti] became [tsi]]] as was the usual pattern in Early Qenya. The word reappear in texts and notes from the 1920s (PE14/43, 72; PE15/32, 68, 78). In one early dictionary entry it was glossed more generally as “affair, matter, thing”, but this entry was deleted (PE15/68); in other early writings the word for “affair” was given as ᴱQ. natto (QL/64). The word reappeared in The Etymologies from the 1930s with a simplified stem form nat- given its Noldorin equivalent N. nad (Ety/NĀ²). The word appeared again in the late 1960s in notes associated with Q. ná- “to be”, where it was given the primitive form ✶năta (VT49/30).
nixi
name. fish
náma
noun. thing
A word for a “thing” in notes from 1969, likely a combination of ná- “be” and the instrumental suffix -ma, appearing in the phrase eleni námaron anírime “stars are the most beautiful of (created) things”. In the translation of the phrase Tolkien put a parenthetical “created” before the gloss “things”, but I don’t think he intended to imply that this was part of the meaning of the word, but rather a sense omitted from the Quenya phrase.
Neo-Quenya: For purposes of Neo-Quenya, I would stick to the better attested nat “thing”.
A word for “thing” in notes associated with the Quendi and Eldar essay from 1959-60, related to the verb ëa “exists” and contrasted with tengwë “sign”. It thus seems to more exactly mean “a thing that actually exists in the world”, as opposed to a representation of that thing or thing that does not exist. The more ordinary Quenya word for “thing” is nat.