The phrase "cage in" means to confine a person or an animal. Synonyms for "cage in" include "enclose," "fence in," "trap," "imprison," "box," "encircle," and "hem in." These words represent the act of restricting movement or freedom, either by physical means or psychological constraints. The way we speak has a profound impact on the way we think and feel. By using different synonyms for "cage in," we can evoke different emotions and ideas in our audience. While each of these words has its own nuances, they all share the idea of confinement and restriction.