I’ve received an inquiry about the meaning of the runes on Kíli’s talisman stone. The words inscribed on it are innikh dê.
The first is the singular imperative of the verb nanakha “return, come back”, which has a triliteral root √n-n-kh which obviously has been formed from the biliteral root √n-kh “come,” which is in turn clearly related to Adûnaic nakh-. The pattern is iCCiC, as is generally the case with other imperatives.
Dê combines a preposition d(u) “to, toward” (whose real-world inspiration is the Gothic preposition du) with the 1st person singular pronominal suffix -ê.
The meaning of the phrase on the stone is therefore “return to me.” Its precise application in Kíli’s case is something I’m not privy to, and I expect that passionate film fans can guess it more easily than I can.