The word 销售 is formed by combining two individual characters, each contributing its core meaning to create a new, composite concept. The first character, 销, primarily carries the idea of "to sell" or "to market", involving the action of distributing goods. The second character, 售, means "to sell" or "to dispose of", focusing on the completion of the transaction. By placing them together, the word synthesizes these related actions into a single, broader term that encapsulates the entire process from offering goods to a customer (销) through to the final act of completing the sale (售).