The Chinese word 预订 (yùdìng), meaning "to book" or "to reserve", is a compound word formed by combining two meaningful characters: 预 (yù), which means "in advance" or "beforehand", and 订 (dìng), which means "to agree upon", "to conclude", or "to subscribe". When combined, the characters logically sequence the action, with 预 modifying 订 to specify the act of agreeing upon or ordering something beforehand, thus creating the specific meaning of making an advance reservation or booking.