A hill in East Beleriand where Denethor died (S/122), translated “Lonely Hill” (LR/143, WJ/185). This name is a combination of amon “hill” and ereb “lonely” (SA/er, Ety/ERE).
Conceptual Development: In Silmarillion drafts from the 1930s, this hill was briefly named N. Amon Thoros (of unclear meaning), but this was changed to Amon Ereb, translated “Lonely Hill” (LR/56). The name also appeared in The Etymologies with the derivation given above (Ety/ERE).
A word for “single, alone, [N.] isolated” derived from primitive ✶erikwa base on √ER “one” (VT42/10; Ety/ERE). It is an element in names like Erebor “Lonely Mountain” and Amon Ereb “Lonely Hill”.
Conceptual Development: In The Etymologies of the 1930s its primitive form was ᴹ✶ereqa (Ety/ERE). The Gnomish Lexicon of the 1910s instead had G. ereg “alone, only” along with G. erethrin “isolated, solitary, lonely” (GL/33). The latter was a noun form of ereth “solitude, oneness, loneliness” and it had a variant erethog originally glossed “united, one” before being assigned the same meaning as erethrin.