ㄅㄧㄢbiānㄏㄨㄢˋhuàn

  1. 邊境禍患亂事北史·三八·》:突厥強盛可汗大義公主宇文由是邊患。」五代史平話··》:高平之後氣沮力竭邊患。」

foreign invasion, disaster on border due to incursion