Antonyms for the phrase "doing a turn" can include stationary, still, immobile, inactive or motionless. The term "doing a turn" typically implies that someone is moving, rotating, or completing a task, so the antonyms suggest a lack of movement or action. In some contexts, antonyms could also include neglecting a job, avoiding responsibility, or failing to complete a task. For example, if someone is not "doing a turn" in a job, they might be seen as lazy or apathetic. Varying antonyms could apply, depending on the specific connotation and usage of the phrase.