“tree / wood” in Japanese is 木, read boku, moku, ki (ぼく, もく, き, こ). It is a Grade 1 Kyōiku kanji, taught in year 1 of Japanese elementary school, and appears in words such as 木曜日 (Thursday).
What does 木 mean?
大きな木が あります。
Same sound, different character — the classic trap. Compare them side by side: