Both sides of the boulevard are shaded by tall trees.
Tips
usage
Read yīn for the plain 'tree shade' sense, almost always bound: 树荫 (tree shade), 林荫道 (tree-lined avenue), 绿树成荫. A separate reading yìn carries the 'shelter, protection' senses (荫蔽, 恩荫).
Grass radical at the top marks 荫 as vegetation-related: tree shade is cast by leafy plants overhead. Even though tree shade conceptually involves 木, the leafy-canopy aspect made 艹 the indexing radical.
阴 supplies both sound and meaning: it itself means shaded, the sunless north side of a hill. Combined with the grass radical, 荫 is leafy shade. The same phonetic also yields 茵 (mat).