Grimacing means "twisted facial expression expressing disgust or pain."

A facial expression usually of disgust, disapproval, or pain is called a

"Vague" means to be precise.

Now there was a constant odor, and Brian took another look at the pilot, found him rubbing the shoulder and down the arm now, the left arm, letting go more gas and wincing. "Wincing" means

Irregular atmospheric motion, especially when characterized by up-and-down currents is

To "brace" yourself means

"Tenacity" is

To move with a smooth continuous motion is to

Giving a slight involuntary grimace or shrinking movement of the body out of or in anticipation of pain or distress.

He pulled the torn ___________________ of his windbreaker, pieces really, around his shoulders...(ch.4).

Momentarily means

If the pain in your neck abated, that means the pain became

Within reasonable or proper limits means