The word 发疯 is formed through a vivid conceptual combination where the first character 发 (fā) acts as a dynamic verb meaning "to emit" or "to send out", portraying an active outbreak or release. It is paired with the second character 疯 (fēng), which represents the state or substance being unleashed: "madness" or "insanity". Together, they create a powerful mental image of madness actively bursting forth or being manifested, as if it were an internal force violently expressing itself outwardly.