The word 肝脏 is formed through the combination of two meaningful characters, each contributing a specific idea to create a single, precise concept. The first character, 肝, independently means "liver", the specific organ. The second character, 脏, is a general category term meaning "internal organ" or "viscera". By placing them together, the formation follows a logical pattern where the specific (肝) is clarified and categorized by the general (脏), resulting in a compound that explicitly and unmistakably denotes the "liver organ", distinguishing it from other organs and from metaphorical uses of the word "liver".