The term "cloak and dagger" refers to activities or events that are shrouded in secrecy, conspiracy, or intrigue. Other synonyms for this phrase include "secretive," "mysterious," "covert," "furtive," "surreptitious," and "clandestine." These words suggest that the actions being undertaken are not only hidden from view but also potentially suspect or nefarious in nature. The phrase "cloak and dagger" is often associated with espionage or spy activities, but it can also refer to other types of situations where secrecy and subterfuge are involved, such as political maneuvers, business deals, or personal affairs.