Her mouth thinned; she forced it back into a smile.

Paris's mouth thinned, but his voice was calm when he spoke.

Her mouth thinned and she hardened her heart to him.

Her mouth thinned to a disapproving line, and she glared.

His mouth thinned with what could have been frustration, or simply disgust.

The old woman's mouth thinned into a narrow line.

He seemed to think so as well, because his eyes darkened and his mouth thinned.

Picard's mouth thinned in a moment's pain at the thought.

His mouth thinned, and she wondered if she'd be as welcome in the space center in the future.

His mouth thinned as he stared at her, then he climbed off the bed.