The term "with undue length" can refer to something that is excessively long or drawn out. Some synonyms for this phrase might include "overly verbose," "needlessly prolonged," "tediously elongated," or "unnecessarily extended." Other options might include "excessively wordy," "long-winded," or "rambling." Each of these synonyms connotes a sense of excess or overindulgence, indicating that the length or duration of something is beyond what is necessary or desirable. Whether used to describe writing, conversation, or any other form of communication, these expressions can help convey the idea that something has become unnecessarily or even intolerably long.