v.咬(牙切齿)

He can almost hear the Auror gnash his teeth. 他简直都能听到那个Auror在磨牙了。

There has been much gnash of teeth over the new legislation. 不少人对新法规感到愤愤不平。

The driver fled after his car knocked somebody down, making other people gnash their teeth in anger. 那个司机撞人后竟然逃跑了， 真令人啮齿。