The phrase "break into" has a number of synonyms that can be used to convey the same meaning. Some of these alternatives include "force entry", "burglarize", "trespass", "intrude", "penetrate", "cross the threshold", "make an entrance", "gain access", "hack", "crack", among others. Each of these synonyms can be used depending on the context, ranging from a physical break-in to a metaphorical intrusion on someone's privacy. Regardless of which synonym is used, the intention behind it remains the same; to describe an unauthorized entry into a space or system.