The phrase "wasted away" typically refers to a state of physical deterioration or wasting, such as when someone is afflicted with a serious illness or condition. Antonyms for this phrase could include "flourishing," "thriving," "growing," "developing," or "prospering." These words all denote a positive state of being and suggest that someone is healthy, well, and achieving success or growth. Rather than languishing or declining, someone who is flourishing or prospering is vibrant and full of life. Using antonyms for "wasted away" can help convey a more positive and optimistic message in your writing or speech.