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tr.v. gnashed, gnash·ing, gnash·es
1. To grind or strike (the teeth, for example) together.
2. To bite (something) by grinding the teeth.
[Alteration of Middle English gnasten, gnaisten, possibly of Scandinavian origin; akin to Old Norse gnastan, a gnashing.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
the act of grinding (the teeth) as in pain or angerthe act of chewing food by grinding the teeth
(of teeth) grinding, as in pain or angerchewing (by the grinding of teeth)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
n. rechinamiento de los dientes.
English-Spanish Medical Dictionary © Farlex 2012