Aelin-uial

In The Silmarillion, Aelin-uial, a Sindarin name translated as Meres of Twilight (aelin = lake, uial = twilight), was a marshy confluence of the river Aros into Sirion, south of Doriath.

The Aelin-uial is the maze of lakes and fens formed where the river Aros met the Sirion, before it fell beneath the Andram. These were Lands heavy with magical enchantment and spells, from two main sources; the Girdle of Melian guarding Doriath to the north of the Aelin-uial, and also from the power of Ulmo the Vala, which was very strong in this area and Sirion's waters. It was here that Turgon and Finrod were given the idea of building their hidden strongholds were located at Gondolon and Nargothrond, which was an idea put into their dreams by Ulmo. The Aelin-uial was under the control of Doriath, a Sindarin kingdom. Thingol's Marchwardens kept secret faeries among the reeds, which they could use to cross in between Sirion's eastern and western banks unseen by anyone. at the southernmost end of the Aelin-uial, the waters of Sirion came together once more from the many,many routes they took through the marshland and, at the place called the Falls of Sirion, fell lots of water in a waterfall down into the earth. It was destroyed in the War of Wrath, which in turn occured at the end of the First Age.

Pronunciation:EYE-LEEN-OOIAL