The word "吩咐" is formed through a process of phonetic and semantic compounding using a single repeated component. It takes the character "分" (fēn), which provides the core pronunciation, and pairs it with the radical "口" (mouth), indicative of speech-related actions, to create two distinct characters: "吩" and "咐". These two near-identical characters are then joined to form a single disyllabic word, where the repetition of the sound and meaning reinforces the concept of giving an oral order or instruction, creating an emphatic and cohesive unit.