betide /bɪˈtaɪd/

• 1. 

  PHRASE If you say woe betide anyone who does a particular thing, you mean that something unpleasant will happen to them if they do it. (某人)倒霉 [正式] [PHR n]

  例：

  Woe betide anyone who got in his way.

  谁妨碍了他，谁就会倒霉。