trizo describes the teeth-grinding action reported when the afflicted person is seized and thrown down.

The attested use describes teeth-grinding as part of the violent condition reported in Mark 9:18.

1. Teeth-grinding amid violent affliction · dominant

   In Mark 9:18, τρίζει is a present active indicative singular verb within the report that wherever the affliction seizes the person, it throws him down; the APB renders the surrounding clause, "he foams at the mouth, grinds his teeth, and becomes rigid."

   Mark 9:18

In the Anselm Project Bible: In Mark 9:18, the APB presents the action as "grinds his teeth" within a description of violent seizure.