Noldorin
-rin
suffix. adjective suffix
-in
suffix. adjective suffix
-ren
suffix. adjective suffix
ninn
adjective. slender
-eb
suffix. adjective suffix
-en
suffix. adjective suffix
-iel
suffix. adjective suffix
-ui
suffix. adjective suffix
ennin
noun. Valian year
idhrin
noun. year
idhrind
noun. year
mîdh
noun. dew
mîdh
noun. dew
ninn
adjective. slender
în
noun. year
în
noun. year
The Etymologies of the 1930s had ninn as a cognate to ᴹQ. ninde “slender”, both derived from the root ᴹ√NIN-DI “fragile, thin” (Ety/NIN-DI).
Neo-Sindarin: I would adapt this word as ᴺS. nind as suggested in HSD (HSD), in keeping with the notion that “nd remained at the end of fully accented monosyllables” (LotR/1115).
Conceptual Development: Early Noldorin word-lists of the 1920s had ᴱN. minedh glossed “fine, slender” (PE13/150) or “thin, fine, small” (PE13/164), derived from primitive ᴱ✶miniyā.