1. To grind the teeth in rage or anguish.

2. To strike the teeth together in rage or anguish.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• gasha,
• vanash,
• rnach,
• ginish,
• chash,
• inish,
• knash,
• ganish,
• nahh,
• ghash,
• gaash,
• gnah,
• ngash,
• goash,
• greysih,
• anath,
• Unwash,
• snaksh,
• gansah,
• Grasha

• gnaw,
• ash,
• gnaws,
• gneiss.

The adverb form of the word "gnash" is "gnashingly".

The adjective form of the word "gnash" is "gnashing".

The plural of the "gnash" can be the "gnashes".

The singular of the "gnash" can be the "gnash".