Taxonomy of meanings for 不虞:  

  • DISASTER
    • NPabeventunexpected misfortunes; emergency
  • SURPRISED
    • VPadSto my surprise, to one's surprise
    • VPadNsurprising, unexpected 不虞之患
  • DIE
    • VPi0figurativethe surprising thing happens> the contextually determiate person dies 《後漢書‧周舉傳》:"今諸 閻 新斬,太后幽在離宮,若悲愁生疾,一旦不虞,主上將何以令於天下?"