Ael

ael or oel is a noun meaning "lake, pool, mere" in Sindarin. The plural is aelin or oelin.

Examples:

• Nen Hithoel = "Lake of Mist"
• Aeluin = "Blue Lake"

References

• The Languages of Tolkien's Middle-earth by Ruth S. Noel
• Hiswelókë's Sindarin Dictionary compiled by Didier Willis