Most plodding is a phrase that indicates a sluggish or slow-moving situation. Its antonyms, on the other hand, stand for quick and efficient movement. Such antonyms can be agile, brisk, swift, lively, energetic, speedy, and expeditious. These words not only describe a quick pace but also denote a sense of alertness and enthusiasm. Agile and brisk depict a movement that is both fast and graceful. Swift and speedy indicate rapid and prompt action without delay. Lively and energetic imply zeal and fervor in carrying out an activity. Lastly, expeditious refers to doing something with great speed and efficiency. All of these words can be considered polar opposites of the term most plodding.