"Sweep off" is a phrasal verb that refers to the act of removing or taking away something quickly and completely. There are various synonyms for this phrase, such as "clear away," "tidy up," "clean up," "dispose of," "eliminate," "get rid of," "wipe out," "eradicate," "eliminate," "remove," and "purge." The choice of synonym will depend on the specific context, but all of these synonyms carry the same overarching meaning of removing something completely. Whatever the word choice, the intent is always to sweep away or remove something in a thorough and efficient manner.