End of the long falls of Andram, translated “Wall’s End” (S/122), a combination of ram “wall” and the lenited form of tâl “(lower) end” (SA/ram, tal).
Conceptual Development: In Silmarillion drafts from the 1930s, this name first appeared as N. Ramdal (LR/262) >> Rhamdal (LR/283). The second form appeared in The Etymologies with essentially the same the derivation as given above, albeit with an initial rh- fitting the earlier Noldorin phonology (Ety/TAL).
ram(b) + tâl (“foot”, here: “end”)