The word "Prorogate" means to postpone or defer official duties, and its antonyms are advance, expedite, and accelerate. To advance means to move forward or make progress in a particular direction, and it is the opposite of prorogate, which involves delaying or deferring such progress. Similarly, to expedite means to speed up or quicken the process of achieving a goal or completing a task, while "accelerate" refers to increasing speed or rate of change. Both "expedite" and "accelerate" represent the opposite of "prorogate," as they focus on fast-tracking progress rather than delaying it.