The phrase "letting next to" implies a sense of proximity and sharing. Therefore, its antonyms would convey distance and separation. Words like apart, distant, isolated, removed, and segregated can be used to describe contrasting meanings. These antonyms suggest a sense of detachment and disconnection, conveying the opposite of "letting next to." For instance, if someone chooses to live in isolation, they prefer not to be near others or anything that could disturb their peace. Alternatively, if individuals decide to work separately, they perform distinct tasks without collaborating with others. While "letting next to" refers to something located adjacent to another thing, its antonyms suggest no connection nor relationship between them.