also: ふるき
Refers to a tree that has lived for many years, often with a sense of dignity or historical value.
神社の境内には大きな古木が立っている。
A large old tree stands in the shrine grounds.
この古木は樹齢五百年と言われている。
This old tree is said to be 500 years old.
Standard kanji spelling; the reading こぼく is the most common.
Alternate reading ふるき, less common and somewhat literary.
Compound of 古 (old) and 木 (tree). The reading こぼく is the on'yomi, while ふるき uses the kun'yomi of 古 and 木.