Extended Strong's Greek Lexicon (Abbott-Smith based)
to gnash
Usage: τρίζω [in Aq.: Amo.2:13; Sm.: Isa.38:14 * ;] __1. prop., of sounds by animals, to cry, chirp, etc. __2. Of other sounds, e.g., trans., τ. ὀδόντας, to gnash or grind the teeth: Mrk.9:18.† (AS)