Gnash Definition
năsh
gnashed, gnashes, gnashing
verb
To grind or strike (the teeth) together, as in anger or pain.
Webster's New World
To grind the teeth together.
Webster's New World
To bite by grinding the teeth.
Webster's New World
(Geordie) To run away.
Wiktionary
noun
The act of gnashing.
Webster's New World
Origin of Gnash
From Middle English gnasten. Origin unknown; the word is probably either Germanic or onomatopoeic. Compare Old Norse gnastan, German knirschen, German Low German gnirschen, gnörschen.
From Wiktionary
Alteration of Middle English gnasten, gnaisten possibly of Scandinavian origin Old Norse gnastan a gnashing
From American Heritage Dictionary of the English Language, 5th Edition
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