"Bolt down" is an expression used to denote the act of quickly finishing a task or meal. However, sometimes one may need to slow down or delay progress instead of speeding up. Hence, a few antonyms of 'bolt down' may include terms like leisurely, savor, and sipping. Alternatively, taking one's own sweet time, relishing, and enjoying can also be used in the context. For example, instead of quickly finishing a meal, one can enjoy and savor the flavors slowly. Similarly, instead of hastily completing a task, one can take their own sweet time and do it leisurely. By using appropriate antonyms, one can convey the opposite idea of bolt down and emphasize the importance of slowing down in some activities.