“(large) tree” in Japanese is 樹, read ju, ki (じゅ, き). It is a Grade 6 Kyōiku kanji, taught in year 6 of Japanese elementary school, and appears in words such as 樹木 (trees).
What does 樹 mean?
庭に大きな樹がある。
Same sound, different character — the classic trap. Compare them side by side: