1.   Clench the jaws, as if chewing hard, while pushing your tongue hard against the roof of your mouth.

2.   Clinton clenched his jaw and stood silently beside the coffin as an honor guard handed him the folded flag.

3.   He clenched his jaw as the pain barrier seemed to break with every passing second.

4.   He swallowed the bile and clenched his jaws until he thought his teeth would crack.

5.   His jaw was clenched tightly, his eyes narrowed.

6.   I often clench my jaw.

7.   Now clench your jaw tight, then on an outward breath let it flop open.

8.   She slopped some of the egg mixture over the side of the bowl and clenched her jaw impatiently.

9.   Patsy had to clench her jaw to suppress her anger.

10.   Shiona clenched her jaw, her irritation rising.