"鬼斧神工" is formed by juxtaposing two parallel compounds: "鬼斧" meaning "ghost axe" and "神工" meaning "divine work". Here, "鬼" (ghost) and "神" (god) represent supernatural forces, while "斧" (axe) and "工" (workmanship) refer to tools and craftsmanship; this combination creates an idiom describing artistry so masterful it seems beyond human capability.