The antonyms for the phrase "are indolent" are active, energetic, industrious, diligent, hardworking, and busy. These words denote a person who is vigorous, productive, and engaged in various activities. The opposite of indolence is not only physical, but it also symbolizes mental alertness and emotional stability. Someone who isn't indolent is always willing to take on tasks that are challenging or demanding. Being hardworking and busy, they are always on their toes, meeting deadlines, and driving their workload with enthusiasm. They are not content to sit idle and while away the hours; rather, they are always striving to achieve their goals and make the most of their time.