clench

Writing on Instagram, she said: "I have TMJ and wake most days with awful headaches from tension & jaw clenching."

He often wore wire-rimmed glasses, and his jaw jutted forward, as if clenched.

The retired aerospace engineer, who lives in Sierra Madre, did about four reps before his teeth clenched, his legs trembled and he let out short puffs of air through pursed lips.

As he was moved into the ambulance “his jaw suddenly started to clench down”, she said.

Dark feelings and internal conflicts characterize these first episodes, which are full of raised voices, clenched jaws and steely stares.