tall tree; forest tree; arbor
Refers to a tall, upright tree, often in contrast with shrubs or bushes. The gloss 'arbor' is a botanical term for a tree, not a garden structure.
The park has many tall trees, creating cool shade in summer.
The tall trees in this area are mainly cedars and cypresses.
deciduous tall tree
The kanji 喬 means 'high' or 'tall', and 木 means 'tree'. The reading きょうぼく is the on'yomi of these characters. The word is a straightforward compound meaning 'tall tree'.