| Gnash 1. (v. t.) To strike or grind together in anger; as, to gnash the teeth. 2. (v. i.) To grind or strike the teeth together. Thesaurus Entries bite, bolus, champ, chaw, chew, chew the cud, chew up, chomp, cud, gnaw, gob, grind, gum, masticate, morsel, mouth, mouthful, mumble, munch, nibble, nip, quid, ruminate, snap, swallow |