| 1. | to grind or strike (the teeth) together, esp. in rage or pain. |
| 2. | to bite with grinding teeth. |
| 3. | to gnash the teeth. |
| 4. | an act of gnashing. |

Gnash
Heb. harak, meaning "to grate the teeth", (Job 16:9; Ps. 112:10; Lam. 2:16), denotes rage or sorrow. (See also Acts 7:54; Mark 9:18.)