purportedly /pəˈpɔːtɪdlɪ/

• 1.  

  ADV（副词） If you say that something has purportedly been done, you mean that you think that it has been done but you cannot be sure. 据称 [正式]

  例：

  ...documents that were purportedly smuggled out of China.

  ...据称已被偷运到中国境外的文件。