The phrase "chews over" can be used to describe the act of considering or pondering something. Some potential antonyms for this phrase might include "dismisses" or "rejects," which suggest a lack of consideration or thought. Other antonyms might include "decides" or "concludes," which suggest that a decision has been made and there is no further need for consideration. Additionally, words like "ignores" or "neglects" could be considered antonyms for "chews over," as they imply a lack of attention or effort towards considering an issue or problem. Ultimately, the choice of antonym may depend on the specific context in which "chews over" is being used.