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

2. He refused to knuckle under to the enemy.

3. The United States, he said, did not knuckle under to demands.

4. Some coaches knuckle under to that.http:///knuckle under.html

5. Tom refused to knuckle under to the robber.

6. They refused to knuckle under to any pressure.

7. Tom refused to knuckle under to the pressure.

8. The Chinese people will not knuckle under in any circumstances.

9. Obama said that we didn't knuckle under, weasel from and hesitate when facing with challenges.

10. You shouldn't knuckle under all the time, your wife cannot always be right.

11. The revolutionary people of the world will never knuckle under to the threat of nuclear weapons.

12. When the chips were down, these people didn't turn tail and knuckle under.

13. In spite of every argument he obstinately refused to knuckle under.

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