The phrase "are cahoots" means two or more people working together to do something that may be considered shady or dishonest. The antonyms for this phrase could include "working independently," "acting in good faith," "being honest," or "not conspiring." The opposite of being in cahoots could also mean "opposing each other," "competing," "not collaborating," or "working against each other's interests." It's important to remember that the context of the phrase "are cahoots" is typically negative, and therefore the opposite would typically be seen as a positive or neutral action. It's always important to communicate clearly and honestly in any situation to avoid any misunderstandings or potential cahoots.