Gnash
2 verses in 2 books of the King James Bible.
By Book
Every Occurrence
Psalms 112:10The wicked shall see it, and be grieved; he shall gnash with his teeth, and melt away: the desire of the wicked shall perish.
Lamentations 2:16All thine enemies have opened their mouth against thee: they hiss and gnash the teeth: they say, We have swallowed her up: certainly this is the day that we looked for; we have found, we have seen it.