A root Tolkien introduced in the late 1960s as the basis for his latest Elvish word for “ten”: Q. quëan/quain, S. pae, T. pai(n) (VT42/24; VT48/6). It was an extension of √KWA “complete” as in “a complete set of (10) fingers”. Prior this late change, the usual word for “ten” was ᴹQ. kainen (along with other variants beginning with kai- or kea-) from the root ᴹ√KAYAN or ᴹ√KAYAR as it appeared in The Etymologies of the 1930s (Ety/KAYAN). This basis for “ten” dates back to the Early Qenya Grammar of the 1920s (PE14/49, PE14/82). Tolkien was still considering √KAYAN for “10” in the late 1960s before replacing it with √KWAY(AM) (VT48/12).
Primitive elvish
ten
root. direction; point (toward); end (in sense of point aimed at)
te
pronoun. they
kway
root. ten
kayan
root. ten
kwayam
cardinal. 10
an
preposition. to
imin
masculine name. One
min
cardinal. one
tī
pronoun. they
This root first appeared in the Qenya Lexicon of the 1910s as ᴱ√TENE “touch, feel”, with derivatives like ᴱQ. tende “sense of touch, sense, sensation, feeling” and ᴱQ. tenya- “feel, touch” (QL/91). G. tent “toe” and G. tentha- “feel with the feet, walk on tiptoe” from the contemporaneous Gnomish Lexicon might be related (GL/70). There were then no further signs of this root for many years, except perhaps the preposition ᴹQ. ten “for” in Fíriel’s Song of the 1930s.
The root √TEN “direction” eventually reappeared in Quenya Notes (QN) from 1957 with a single derivative, adverb or preposition Q. tenna “to the object; up to, to (reach), as far as”, as in the phrase Q. tenn’ Ambar-metta “unto the ending of the world” (LotR/967). The root √TEN also appeared with gloss “end in sense of point aimed at” (vs. √MET = “finally”) along with derivatives Q. tenna “to the point, until” and Q. †tenya- “arrive, end (not at speaker’s[?] place)” in notes from the late 1950s or early 1960s (VT49/24).
In notes from 1968, √TEN was at first used for “to, arrive (at), reach” along with derivatives Q. tenna “right up to a point (of time/place); go as far as” and a verb Q. ten- “arrive, come to”, but then Tolkien changed {√TEN >>} √MEN and revised all the verb forms of {Q. ten- >>} men- (VT49/23-24). He then gave a new gloss “point” to √TEN and updated derivatives: Q. tenna “to the point” and Q. tenta- “point to, [point] out, indicate” (VT49/24). In another note associated with 1968 drafts of the Ambidexters Sentence, the root √TEN was glossed “toward” (VT49/24).
Neo-Eldarin: For purposes of Neo-Eldarin, I’d ignore Tolkien’s brief interpretation of this root as “arrive”, and stick with the meaning “(up to the) point”, consistent with its non-deleted derivatives. For “arrive”, I’d use Q. anya- from Late Notes on Verbs written in 1969, reserving √MEN for “go” (LVS).