§ Angrobel ’Irongarth’ (TI:72) [Isengard]
Later on, the Sindarin name of ’Isengard’ is Angrenost (LotRIII ch.4) with angren ’of iron’ (ANGĀ-) and ost ’city, town with wall around’ (OS-). This earlier compound contains lenited gobel ’walled house or village, ’town’’ (PEL(ES)-) instead. The first element may be a differently formed adjective *ang’rā > N. *angr, *angor ’of iron’; here #angr- in the compound.
For another name see Angost below (3.5).