"terrified expression" is a correct and usable phrase in written English.
It can be used to describe someone's facial expression that shows extreme fear or terror. Example: The little girl's terrified expression gave away her fear of heights as she stood on the edge of the cliff.
López has astonishingly light-colored blue-green eyes and a haunted, even terrified expression.
Just when impact seemed all but inevitable, the car performed a near-perfect emergency stop, wrenching us forward in our seats but bringing itself to rest about a foot in front of the dummy, which bore an appropriately terrified expression.
His terrified expression and posture portrayed how he had been cornered, taunted and then speared.
"A terrified expression spread across her features and she asked if I might excuse her," de Botton writes.
Seeing my terrified expression, Ernie said, "Oh, hadn't you thought about that?" I had to get out of there.
With a terrified expression on her face, Karen ran with the ugly stroller, her feet festooned with Band-Aids, toward police cars up ahead.
The wails were not meant as messages to be decoded; they were terrified expressions of being beyond expression itself".
In the end, what was amazing about the images was not the scar but her expression — terrified, defiant, vulnerable, her face in a dance of emotion, frame by frame.
I do admire directors' continued commitment to creating situations ripe for the deployment of Ron's single acting expression – the terrified wide eyes then the big gulp.
The expression on her face is both terrifying and terrified, and her features look harshly arranged — lips pursed into a lopsided oval, brow bunched, red-lined eyes fixed — as if she had been broken by some unspoken anguish and hastily glued together.
I was terrified, but tried to hold an expression like theirs an expression that said that my pregnancy was planned too, that I wasn't a statistic and didn't need their pity and judgment.
