This is the 2466th most frequent Japanese word.
伸び
"伸び" (nobi) means "growth," "stretch," or "extension."
In this sentence, '伸びている' refers to the act of growing or extending in height, describing the trees in the forest.
木がたくさん伸びている森に行きました。
I went to a forest where many trees are growing tall.
Here, '伸びする' is used in the context of stretching one’s body, often as an exercise or relaxation technique.
体を伸びする時間が必要です。
We need time to stretch our body.
In this sentence, '伸びる' denotes the growth or development of talent or potential over time.