gnash
verb (used with object)
to grind or strike (the teeth) together, especially in rage or pain.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In the past decade these experts have been gnashing their teeth at his proof.
From Scientific American ● Jul. 28, 2023