Horenstein held in balance two qualities that do not usually appear together: a clear grasp of linear musical structure and a ferocious concentration on individual interpretive moments.

He had a knife between his teeth and an axe in each hand, and was glowering with ferocious concentration.

His remaining eye stared at the boy with ferocious concentration.

He drove with ferocious concentration, having learned in Argentina how to endure grueling, long-distance rides, and fans and competitors knew him as quietly charismatic.

She was shivering, and her eyes were squinched shut with ferocious concentration.

He still refused to look anywhere but at my glove, but his look of grim terror had shifted to one of ferocious concentration.

"And that's going to be a big job, and I'm going to do it with ferocious concentration, and hopefully with some success."

Boy and cat ate with the same ferocious concentration and lack of finesse.

In the 1896 "Maternal Caress," a fat-cheeked infant grasps a woman's face with ferocious concentration, as if about to devour her.

The instant Tobin was within sunlight, she halted her limping progress and scowled in ferocious concentration.