The term "negative taxi" typically refers to a situation where a plane must taxi back to the gate because of a maintenance issue or some other problem. Some alternative phrases that could be used to describe this scenario include "return to gate," "gate return," "maintenance delay," or simply "taxi back." These synonyms can come in handy when communicating with passengers or other airport personnel, as they can help to convey important information in a clear and concise manner. Additionally, using varied terminology can help to make conversations more interesting and engaging, which can be especially helpful in high-stress situations.