The word "腥风血雨" is formed by combining two vivid, parallel compounds: "腥风" (wind carrying a bloody stench) and "血雨" (rain of blood). Each character contributes literally to the imagery, 腥 (stench), 风 (wind), 血 (blood), and 雨 (rain), creating a direct metaphor for a violent and brutal conflict through the sensory elements of smell and sight.