The word "嬉笑怒骂" is formed by the direct juxtaposition of four individual characters, each representing a distinct emotional expression or action: 嬉 (to play or frolic), 笑 (to laugh), 怒 (to be angry), and 骂 (to scold or curse). This combination creates a single compound word that collectively encompasses a range of spontaneous human reactions, typically used to describe someone who freely expresses themselves through these varied behaviors.