The word **畅销** is a compound formed by combining two meaningful characters: **畅**, meaning "smooth," "unobstructed," or "free-flowing," and **销**, meaning "to sell" or "sales." Together, they create a metaphorical concept where "sales" are described as "flowing smoothly and without hindrance." This semantic combination results in an adjective meaning "best-selling," "in high demand," or "selling well," efficiently conveying the idea of a product that moves quickly and easily off the shelves.