The Chinese word **下垂** (xiàchuí, meaning "to droop" or "to sag") is a compound word formed through the combination of two meaningful characters: **下** (xià), which means "down" or "below," and **垂** (chuí), which means "to hang down" or "to suspend." Together, they create a verb that semantically and logically describes the action or state of something hanging downward, where **下** indicates the direction and **垂** specifies the manner of hanging, resulting in a clear and intuitive meaning that is more specific than either character alone.