Antonyms for the term "converts into" could include words such as "maintains," "retains," or "preserves." These words suggest the act of keeping something in its original form or state, rather than transforming it into something else. Other antonyms could include "stagnates," which suggests a lack of movement or change, or "deteriorates," which implies a decline in quality or condition over time. Ultimately, the choice of antonym will depend on the specific context and intended meaning of the original phrase. However, by exploring a range of possible antonyms, we can deepen our understanding of the different shades of meaning that can be conveyed through language.