A noun given as ᴱQ. nendo “water mead” in the Qenya Lexicon of the 1910s under the root ᴱ√NEŘE [NEÐE] (QL/66). It was also mentioned in the Poetic and Mythological Words of Eldarissa with the same form and gloss (PME/66). In the Qenya Lexicon, Tolkien indicated it might instead be derived from the root ᴱ√NESE, though how is not entirely clear.

Neo-Quenya: I think this word might be salvaged as ᴺQ. nendo “water mead, *watered plain” for purposes of Neo-Quenya but reimagined as a derivative of √NEN “water”. This can replace ᴹQ. nanda of the same meaning from The Etymologies (Ety/NAD), since in later writings the various Q. nand- forms were exclusively used with the sense “valley”.