Antonyms for the word "prorogating" include words such as "advancing," "expediting," "hastening," and "accelerating." These words convey the idea of moving forward, getting things done quickly, and avoiding delays or postponements. Other antonyms might include "completing," "finishing," "concluding," or "wrapping up," which reflect the idea of bringing a task or project to a timely and efficient close. Overall, the antonyms for "prorogating" emphasize the importance of taking action, being productive, and staying on track, rather than allowing things to drag on or be put off until later.