The word "are impaired" means that someone's ability to function or perform a task is diminished. Some antonyms for this phrase might include "are operative," meaning someone is able to function or perform a task effectively. Another antonym might be "are enabled," indicating that someone has the necessary resources or support to accomplish a task. "Are functioning" is another antonym that suggests someone is able to perform tasks without any hindrances. The phrase "are unimpaired" is a direct antonym, meaning that someone's abilities are not diminished in any way. Finally, "are enhanced" is an antonym that suggests someone's abilities have been improved beyond their previous level.