1. Her knuckles whitened as she gripped the gun.

2. It is arguable whether the rebels will knuckle under.

3. His fists clenched slowly until his knuckles were white.

4. She often cracks her knuckles when she's speaking - it's one of her little idiosyncrasies.

5. The only thing to do was knuckle down and get on with some serious hard work.

6. He rubbed his hands together, cracking his knuckles as he tried to control his anger.

7. Some of his jokes are a bit too near the knuckle for my taste.

8. You'll shoot in a truer straight line if you knuckle down.

9. His act is too near the knuckle for me.

10. The girl tapped the door with her knuckles.

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11. The remark earned him a rap on the knuckles.

12. He was rapped over the knuckles by the management.

13. He managed to knuckle down to his lessons long enough to pass his examination.

14. I joined the workers on strike and was rapped over the knuckles.

15. He is clearly ready to knuckle down to the task.

16. I decide to knuckle down for an hour and get the job done.

17. The company was rapped over the knuckles for broadcasting the interview.

18. David Seaman was back in the Arsenal goal after breaking a knuckle.

19. I'm going to have to knuckle down to some serious study.

20. He got a rap over the knuckles from the teacher for not doing enough work.