The word prelimit doesn't have many direct synonyms, but there are several related words and phrases that can be used to convey a similar meaning. For example, predefine, pre-establish, and pre-arrange all suggest the idea of setting limits or boundaries ahead of time. Similarly, terms like pre-adjust or pre-determine can be used to indicate that something has been predetermined before any actual action or decision has been taken. Other options might include descriptors like pre-planned or pre-organized, which suggest that something has been prepared in advance with a specific goal or outcome in mind. Ultimately, the best synonym for prelimit depends on the context and intended meaning of the word in question.