The antonym for the phrase "was stirred up" can vary depending on the context. However, some common antonyms could be "calmed down," "settled," "soothed," "complacent," or "unaffected." If the phrase is related to a conflict or argument, antonyms could include "resolved," "pacified," "harmonized," or "conciliated." On the other hand, if the phrase is related to excitement or enthusiasm, antonyms could be "bored," "uninterested," or "apathetic." It is essential to consider the meaning and context of the phrase to accurately determine its antonym, as there can be several antonyms for a phrase based on its usage.