The opposite of keeping vigil would be neglecting or ignoring something or someone. Antonyms for "keeps vigil" include abandoning, deserting, disregarding, neglecting, overlooking, and ignoring. When someone "keeps vigil," they are actively paying attention and watching over something or someone, whereas an antonym denotes a lack of attention or care. It is important to note that the antonym of "keeps vigil" varies depending on the context in which it is used. For instance, if the phrase is used in a religious setting, its antonyms may include ignoring, disregarding, or blasphemy. In the end, vigilance is essential in various aspects of life, and its antonyms suggest a lack of diligence and care.