is knuckling
- present progressive of knuckle (3rd person singular).
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
So, now, on the eve of the Olympics, Sharman, a showman in the Usain Bolt mould, is knuckling down and putting his own advice on overcoming adversity into practice.
From The Guardian • Jul. 25, 2012
