'Gnasheth' in the Bible

The wicked seeth, and hath been angry, His teeth he gnasheth, and hath melted, The desire of the wicked doth perish!

and wherever it doth seize him, it doth tear him, and he foameth, and gnasheth his teeth, and pineth away; and I spake to thy disciples that they may cast it out, and they were not able.'