The name of Mirkwood after its restoration at the end of the War of the Ring (LotR/1094, Let/382). The initial element is eryn “woods”, and the second element is a compound of lass “leaf” with the lenited form of calen (PE17/33, Let/382). Elsewhere, L(h)asgalen “Green of Leaf” was given as one of the names for Laurelin (LR/210, MR/155).
Sindarin
Eryn Lasgalen
noun. wood of greenleaf
eryn lasgalen
place name. Greenwood the Great, (lit.) Wood of Greenleaves
Elements
Word Gloss eryn “wood, forest (of trees)” lass “leaf, leaf; [G.] petal” calen “green; fresh, vigorous; †bright, green; †bright, [N.] bright-coloured; [S.] fresh, vigorous”
eryn (“wood”), lass (“leaf”) + calen (“green”)