The word 人群 is formed by placing the character 人 (person) individually, alongside the character 群 (group, flock, gathering). It creates a direct, pictorial logic: one begins with the singular concept of a "person" and then combines it with the concept of a "group", resulting in the unified idea of a "crowd" or "multitude of people". The formation is intuitive, building the meaning from a single unit to a collective whole through this simple visual and conceptual combination.