When her focus suddenly sharpened, and she could see clearly again, she let out the last of those breaths in a long sigh, and stretched.

Miller's dark features sharpened suddenly and his eyes were those of an animal at bay.

The look on her face sharpened suddenly, as if it were a mask someone had just pressed themselves up behind.

Now, you, for instance, "she said, her vague look suddenly sharpening into pinpointed attention," you, I should think, do.

But the air of anticipation suddenly sharpened.

The pain in her foot suddenly sharpened, but only from anticipation.

The unfocused feelings that had haunted his mind for the last few days suddenly sharpened to a point.

But the raider's voice sharpened suddenly and went cold, breaking into her thoughts.

"I don't know what we can-" Macenion's voice suddenly sharpened.

His face sharpened suddenly as if the skin had drawn tight.