"재" (jae) is a Korean word that can refer to various concepts depending on the context. In general, it often means "material" or "substance." In traditional Korean culture, it can also refer to the ashes left after burning something, symbolizing transformation or the remnants of a process. In the context of Korean language, "재" can be used in different phrases and expressions. For example, it appears in words related to recycling or waste management, emphasizing the importance of reusing materials. Understanding its various meanings can enhance comprehension of Korean literature and cultural references.