The word "槐树" is formed by combining the character "槐", which specifically refers to the locust tree species and is itself a pictophonetic character composed of the semantic radical "木" (wood) indicating its relation to plants, and the phonetic component "鬼" (guǐ) approximating its pronunciation, with the character "树", meaning tree, which acts as a generic term to clarify that "槐" is a type of tree, resulting in a compound noun that explicitly denotes the locust tree.