grip something tightly
grip something firmly

She started to turn away, but he reached out quickly and gripped both of her arms firmly.

The three men firmly gripped their weapons and tried to see through the darkness.

She looked at his hand, firmly gripping her upper arm.

He tried to loosen his hands, but they were firmly gripped.

John gripped firmly, put his weight on the hand that held the man's wrist to the ground, and pulled.

The Tekna was still gripped firmly in his right hand.

Joshua firmly gripped Maggie's arm and led her down the steps.

She held out a hand, which Larry gripped firmly.

"I'll need him if I expect to make any time," she said, one hand still firmly gripping the reins.

I was firmly gripped by the hand and I felt an arm about my waist.