arboreal – relating to trees
(Pronounced aa-baw-ree-uhl)
To remember the definition of the word arboreal, use the following mnemonic:
Their arms bore the weight of a really (arboreal) big tree.

Examples of arboreal in a sentence
Deforestation is a major issue for arboreal creatures.
She studies arboreal mammals for a living.
His bedroom window had a stunning arboreal view.