Antonyms are words that have the opposite meaning of the given word. For the word "re-calibrate," which means to adjust or fine-tune something again, the antonyms would be to misalign, miscalibrate, unadjust, ignore, or neglect. These words indicate a lack of attention to detail or an unwillingness to make necessary changes to achieve optimal outcomes. While re-calibration is often necessary for machinery or technical devices, neglecting to do so could result in inaccuracy or malfunction. Therefore, it is essential to choose the appropriate antonym for the context in which it is used to avoid any potential harm or damage.