The antonyms for the phrase "opens into" can be expressed in several ways, including "closes off," "leads away from," "diverts from," or "disconnects from." Each of these phrases conveys a sense of closure, separation, or inaccessibility that is opposite to the meaning of "opens into," which suggests a connection, availability, or accessibility. For instance, if a door "closes off" a room instead of "opening into" it, the space becomes isolated and inaccessible. Therefore, the choice of words to describe the opposite of "opens into" can vary depending on the context and the type of connection or access involved.