KanjiJLPT N2
Forest

forest, woods

Mnemonic

A tree climbs on top of a grove, its roots digging into the canopy below. The grove darkens as branches intertwine so thickly that no light gets through—you're lost in a deep, ancient forest.
Additional thoughts
Visualize one tree perched on top of two trees (the grove). The vertical stacking creates the density of a forest. Three trees total: one above, two below, forming the kanji shape exactly.
Quick recall
A tree perched atop a grove plunges everything into a dark forest.

Details

The keyword for 森 is forest. This kanji depicts three trees grouped together, visually conveying the idea of a dense collection of trees forming a forest. While a single tree represents an individual tree and two trees suggest a grove or woods, the tripling of the tree element intensifies the meaning to represent a thick, lush forest. It evokes a sense of depth, darkness, and abundance of vegetation.
On'yomi
しん
Kun'yomi
もり