The Chinese word **替代品** (tìdàipǐn), meaning "substitute" or "replacement product," is a compound noun formed through straightforward semantic combination: the verb **替代** (tìdài), meaning "to substitute for" or "to replace," is combined with the noun **品** (pǐn), meaning "product," "article," or "item." This structure follows a common Mandarin pattern where an action or descriptive element modifies a categorical head, resulting in a term that logically denotes "an item for substituting"—essentially, a product that serves as a replacement for another.