luvailin

place name. Shadowmere

A mere (lake) in Eldamar under the shadow of Oiolossë, mentioned only in Tolkien’s “Unfinished Index” of The Lord of the Rings (RC/217). Its second element is likely ailin “lake”, and its initial element is probably some derivative of the root √LUB “shadow, darkness”.

Elements

Word	Gloss
LUB	“shadow, darkness”
ailin	“a large lake, (large) lake, [ᴹQ.] pool”