The phrase "spoils rotten" is often associated with something that has gone bad or rotten. Antonyms for this phrase would include words such as fresh, pristine, pure, and clean. These words would typically be used to describe something that is new, unspoiled, and well-maintained. Other antonyms might include words like healthy, wholesome, and nourishing, which suggest positive attributes and overall well-being. By focusing on the antonyms of "spoils rotten", we can better appreciate the value of maintaining and caring for the things we have, whether those things are material possessions, relationships, or other aspects of our lives.