Cloak-and-dagger refers to something that is secretive, mysterious, or often involving espionage. The antonyms for the term cloak-and-dagger are transparent, open, honest, direct, and straightforward. These words indicate an openness and honesty in communication or behavior. Transparent implies clarity and lucidity, and anything that is transparent is easy to understand. Open suggests frankness and accessibility, and it characterizes a situation that is uncomplicated and clear. On the other hand, honest implies sincerity, truthfulness, and lack of deceit. It is the opposite of being deceptive or secretive. Direct and straightforward suggest a candid and clear approach to a situation without artifice.