The antonyms for the phrase "chipped away at" could be "built up," "strengthened," or "reinforced." These words imply a process of adding something rather than taking away from it. If we consider a stone sculpture, for example, chipping away at it would mean removing parts of it to create a desired shape. On the other hand, building up the sculpture would translate into adding more material to enhance its features. In terms of personal growth, chipping away at a habit or problem may take time and patience, but building up positive habits through daily routine and self-care practices can help reinforce lasting change.