The phrase "ate away" refers to the process of gradual destruction or degradation caused by continuous consumption, erosion, or decay. Some antonyms for "ate away" include "built up," "restored," "strengthened," and "revitalized." These words are often used to describe the process of repairing or recovering from damage caused by the process of "ate away." For example, after years of neglect, a historic building may be restored to its former glory, and a weakened immune system may be strengthened by a healthy diet and exercise. By using these antonyms, we can describe the positive changes that occur when we work to reverse the effects of time, wear, and tear.