形容詞 arboreal:

1. of or relating to or formed by trees
   同義詞：arborical, arborary, arborous
2. inhabiting or frequenting trees
   同義詞：arboreous, tree-living
3. resembling a tree in form and branching structure
   同義詞：arboreous, arborescent, arboresque, arboriform, dendriform, dendroid, dendroidal, treelike, tree-shaped

1. Man was evolved from an ancestor that was probably arboreal.
   人大概是從住在樹上的祖先進化而來的。
2. Squirrels are arboreal creatures.
   松鼠是棲於樹上的動物。

ar.bo.re.al

adj.（形容詞）
Relating to or resembling a tree.
樹的：與樹有關(guān)的或類似樹的
Living in trees; arboreous:
在樹林中生活的；多樹的：
例句：
arboreal apes.
生活在樹林中的猿

來源：
From Latin arboreus
源自 拉丁語 arboreus
from arbor [tree]
源自 arbor [樹]

【引伸】
arbo.really
adv.（副詞）