The word 出售 is formed by combining two characters, each contributing a core meaning to create a new concept. The first character, 出 (chū), carries the idea of "to exit" or "to bring out". The second character, 售 (shòu), means "to sell". When placed together, they conceptually merge into the action of "bringing out for sale", effectively forming the compound meaning of "to offer for sale" or "to sell". It is a logical semantic construction where one action (bringing out) directly modifies and enables the primary action (selling).