Gristan
Bosworth & Toller Anglo-Saxon Old English Dictionary - gristan
According to the Old English Dictionary:
(?)
- gristan
- to gnash the teeth :-- Cyrmiende, gyrst l cri&m-tilde; ( = ? gyrstende l crimende) stridule. An. Ox. 4605. [N. E. D. grist to gnash the teeth.] See preceding word. gristan