gnash /næʃ/ ( gnashing, gnashed, gnashes )

• 1. 

  PHRASE If you say that someone is gnashing their teeth, you mean they are angry or frustrated about something. 咬牙切齿

  例：

  If you couldn't attend either of the concerts and are currently gnashing your teeth at having missed out, don't despair.

  如果你两场音乐会都去不了而为此咬牙切齿的话，别绝望。