The underlined word in the sentence is "reciprocal." To determine the opposite meaning, we can look at the context in which the word is used. In this sentence, the word "reciprocal" suggests that friendship is always mutual, meaning that both parties involved in the friendship give and receive in equal measure.

Option 1: "Mutual" is not the opposite of "reciprocal" in this context. "Mutual" means that both parties involved in the friendship have the same feelings or share the same opinions, which aligns with the idea of reciprocity.

Option 3: "Shared" is also not the opposite of "reciprocal" in this context. "Shared" suggests that something is divided or distributed between two or more parties, which can also imply reciprocity in a friendship.

Option 4: "Corresponding" is not the opposite of "reciprocal" in this context. "Corresponding" means there is a relationship or connection between two things, which is similar to the idea of reciprocity.

Option 2: "One-sided" is the opposite of "reciprocal" in this context. "One-sided" means that one party is putting in all the effort or giving while