A root in The Etymologies of the 1930s glossed “year” with derivatives like ᴹQ. yén/N. în “year” (Ety/YEN). Tolkien’s ongoing use of words like Q. yén and S. ínias “annals” indicate its ongoing validity (LotR/377; MR/200), but in Quenya at least the meaning shifted to that of an “Elvish long year”, equal to 144 solar years (LotR/1107; MR/471; NM/84).
Middle Primitive Elvish
lath
root. string, thong
la(n)srondo
noun. hearer, listener, eavesdropper
las
root. listen
weirē
feminine name. Weaver
yen
root. year
yenrinde
noun. year
A root in The Etymologies of the 1930s glossed “string, thong”, with derivatives like ᴹQ. latta “strap” and N. lhath “thong of (?leather)”, the last gloss being somewhat unclear (Ety/LATH).