This root appeared in The Etymologies of the 1930s glossed “red” (Ety/KARÁN), a later iteration of ᴱ√KṚN of the Qenya Lexicon of the 1910s of the same meaning, but with syllabic ṛ (QL/48). Its main Quenya derivative, Q. carnë, retained the same form throughout Tolkien’s life, but its Gnomish forms G. carn(in) “scarlet” and G. crintha “rosy, pink” (GL/25, 27) became N. caran “red” in the 1930s, and retained that form thereafter.
Middle Primitive Elvish
nas
root. point, sharp end
eʒ-
verb. to be
karan
root. red
karani
adjective. red
kuldā
adjective. red
met
root. end
metta
noun. end
yē
root. to be
ē
root. to be
ī
root. to be
A root in The Etymologies of the 1930s glossed “point, sharp end”, with derivatives like ᴹQ. nasse “thorn, spike”, N. nass “point, (sharp) end; angle, corner” and ᴹQ. nasta-/N. nasta- “to prick” (Ety/NAS). It also had an s-prefixed variant ᴹ√SNAS or ᴹ√SNAT whose most notable derivative was N. naith “gore” (Ety/SNAS). Tolkien used the name S. Naith for the wedge of land in Lórien between the rivers Celebrant and Anduin in The Lord of the Rings (LotR/347).
The derivation of N. naith from ᴹ√SNAS/SNAT is unclear, however, and later on Tolkien gave a new etymlogy of this word from the root √NEK “narrow” (PE17/55; UT/282). This may mean Tolkien abandoned ᴹ√(S)NAS, but I think it is worth retaining ᴹ√NAS for purposes of Neo-Eldarin for words like nasta- “to prick”.