A word appearing in several sets of notes from the late 1960s having to do with Hands, Fingers and Numerals. It was related to the finger name of the fourth finger (representing the sister). Tolkien mostly glossed it either as “(little) girl” or “sister (diminutive)”, but in one placed indicated it originally meant “pretty little thing” (VT47/33) and in another that it might be used for “daughter” (VT47/15). He also gave it several derivations, from √NET “trim, pretty, dainty” (VT47/33) or the root √NETH which itself was given a variety of meanings: “sister” (VT47/12, 26, 34), “(young) woman” (VT47/15, 32, 39) or “fresh, lively, merry” (VT47/32).
Neo-Quenya: For purposes of Neo-Quenya, I think the meaning “(little) girl” is the most useful. For “sister” I would use nésa.
A root element Tolkien gave unglossed in notes on Eldarin Hands, Fingers and Numerals from the late 1960s serving primarily as the basis for extended √NETER “nine”; Tolkien explicitly contrasted it with √NETH “sister”, used for the finger-name of the fourth and ninth fingers but not etymologically related “nine” (VT47/11-12). However in somewhat earlier versions of these notes from 1968, Tolkien glossed √NET as “trim (pretty, dainty)” and derived the finger name Q. nettë “little girl” directly from this root along with other words like Q. netil “trinket” and netya- “trim, adorn” (VT47/33).
Neo-Eldarin: For purposes of Neo-Eldarin, I think it is worth retaining the “pretty, dainty” sense of this root, though not necessarily connecting it to “nine”, which can simply be from unrelated √NETER.