Retooled, which means to adapt or update something for a different purpose, has a few possible antonyms depending on the context. If retooling means improving, then some antonyms could be downgrading or downgrading. Similarly, if one is preparing for a new venture by retooling, the antonym might be abandoning or abandoning, or perhaps ignoring or neglecting the need for an overhaul. In contrast, if retooling is equivalent to changing the form, then some antonyms might be preserving or maintaining the status quo or maybe reverting, meaning returning something to its original state. Ultimately, the antonym for retooling relies upon the context, and it may have various interpretations.