The phrase "wert adjacent to" can be replaced with several antonyms depending on the context of the sentence. Some of the antonyms that can be used are "were distant from," "were separated from," "were isolated from," "were apart from," "were remote from," and "were not near." These antonyms denote a sense of distance, separation, and absence, indicating that the subject was not located in proximity to the object. The choice of antonym will depend on the intended meaning of the sentence and the context in which it is used.