Middle Primitive Elvish
nak
root. bite
nakma
noun. jaw
nakse
noun. tooth
nakt-
noun. biting
nakat
root. eighteen
skelnā
adjective. naked
akrā
adjective. narrow
karpa
root. ?
nelek
root. tooth
ni-ndakubākyē, uklaina ndere
I will slay thee, wicked man
tul-
verb. come, am coming, have come, am arrived, am here
A root in a currently unpublished list of numerical roots from the late 1930s, apparently part of the Elvish duo-decimal counting system, where 19 = 18 + 1, etc. (PE14/17 note #8).