Delaying, the act of postponing or putting off a task or action, has several antonyms. The opposite of delaying is advancing, which means to move forward or progress in a task. Another antonym for delaying is hastening, which implies acting quickly or with urgency. On the other hand, retarding is an antonym for delaying, which means delaying or slowing down progress. In contrast, quickening is another antonym, which means accelerating or speeding up the pace of an activity. These antonyms of delaying signify the importance of timely action and the need to avoid procrastination that can hinder progress and productivity.