'Gnash' in the Bible

The wicked will see it and be vexed,He will gnash his teeth and melt away;The desire of the wicked will perish.

All your enemiesHave opened their mouths wide against you;They hiss and gnash their teeth.They say, “We have swallowed her up!Surely this is the day for which we waited;We have reached it, we have seen it.”