Mis-apply, meaning to use something inappropriately or incorrectly, has several antonyms that convey the opposite meaning. One antonym is to "correctly apply," which means to use something in the right way, as it was intended. Another antonym is "properly employ," which implies utilizing something according to its purpose or function. "Appropriately utilize" is another antonym that signifies using something in a suitable and fitting way, taking into account the context and circumstances. Lastly, "rightly employ" is an antonym that suggests using something in the correct or proper manner, without causing harm or damage. Using these antonyms can help us communicate more clearly and effectively, avoiding misunderstandings and errors.