The word "真是" is formed through the direct combination of two independent, meaningful characters: 真 (zhēn), which conveys the concept of "true", "real", or "genuine", and 是 (shì), which fundamentally means "to be" or "is". The formation is conceptual and semantic, where the first character 真 acts as an intensifier or qualifier that modifies the state of being expressed by 是, effectively fusing them into a single unit that expresses the idea of "truly is" or "really is", thereby creating a new consolidated expression of emphatic affirmation or judgment from its core components.