Middle Primitive Elvish
phelek
root. (animal’s) horn; steep mountain peak
pheleg
root. cave
gat(h)
root. *cave
rǭda
noun. cave
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
An unglossed root in The Etymologies of the 1930s with derivatives like N. gath “cavern” and N. gador “prison, dungeon” (GAT(H)), so probably meaning something like “✱cave”. Its most notable derivative was N. Doriath “Land of the Cave”. But later on in this same entry, Tolkien added Doriathrin words Dor. gad “fence” and Dor. argad “outside the fence”, indicating a conceptual shift in the meaning of this root. Indeed, in later versions of The Silmarillion, S. Doriath was translated “Land of the Fence” containing the element S. iath “fence” (WJ/370, 378), so most likely ᴹ√GAT(H) “✱cave” was abandoned.