The antonyms for the phrase "is dilatory" include words such as prompt, timely, quick, and expeditious. Dilatory means to be slow to act or to cause a delay while its antonyms refer to being efficient, punctual, and immediate. If someone is dilatory, it may imply that they are lazy, unproductive, or unreliable. However, using the antonyms, we can describe someone as being diligent, efficient, and proactive. Employing these words can make our communication more effective, and it also helps us to convey our message more clearly. By understanding the antonyms, we can express ourselves more precisely and get our point across more accurately.