Sindarin 

Angruin

noun. 'Iron Fire'

prop. n. 'Iron Fire'. Tolkien notes "Alter Glaurung > Angruin".

Sindarin [(PE17 Sindarin Corpus) PE17:183] < ? + RUYU blaze (red). Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

angruin

masculine name. Iron Fire

A proposed alternate name of Glaurung, but the change was rejected (PE17/183). This name is a combination of ang “iron” and ruin “fiery red”.

Sindarin [PE17/183.1203] Group: Eldamo. Published by