The word "坏人" is formed through a direct and intuitive conceptual combination. It brings together the fundamental character for "person" (人) and prefixes it with the character for "bad" or "broken" (坏), effectively fusing the two ideas into a single, unified concept. This creates a new, compound idea where the quality of "badness" is inherently attached to the person, resulting in the core meaning of a "bad person" or "evildoer". It’s a straightforward semantic fusion where the first element describes the essential nature of the second.