From Tolkien Gateway
angren (pl. engrin) is a Sindarin word meaning "of iron". The Quenya cognate is angaina.
angren, related to Sindarin ang ("iron"), derived from the Elvish root ANGĀ. It is possible that the full Old Sindarin word is angrina (unattested).
The obsolete, variant or misspelt plural form engren appears in a typescript.
- ↑ 1.0 1.1 J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", pp. 348
- ↑ J.R.R. Tolkien, "The Rivers and Beacon-hills of Gondor" (edited by Carl F. Hostetter), in Vinyar Tengwar, Number 42, July 2001, p. 7