Gnash

Gnash - (Easton's Bible Dictionary)

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.)

Gnash - (Webster's 1828 Dictionary)

GNASH, v.t. nash. To strike the teeth together, as in anger or pain; as, to gnash the teeth in rage.

GNASH, v.i. nash. To grind the teeth.

He shall gnash with his teeth and melt away. Psa 112.

1. To rage even to collision with the teeth; to growl.

They gnashed on me with their teeth. Psa 35.