zaciśnięta szczęka

He had just finished reading, and a muscle leaped in his clenched jaw.

She brought a gentle hand to his clenched jaw.

More than he wanted to, gauging by his clenched jaw.

Through a clenched jaw she said, "Now, you stand firm, sister; this will not take long."

"I love this part," he said through a clenched jaw.

She managed to force an answer through her clenched jaw.

He could just imagine the clenched jaws of the senior officers.

Muscles stood out on either side of her clenched jaw like marbles.

She was tough, with a clenched jaw, like a lady truck driver.

"She was a bookkeeper," he said with a clenched jaw.