He felt Maureen's grip on his arm loosen, then break away.

His grip loosened enough for her to pull out of it.

The grip on my wrist loosened: the old hand fell away.

Her grip on my hand loosened and I freed myself.

The guard's grip loosened a little as she turned to protest the order.

Then his grip loosens, and he falls into the sea.

His grip on my hand loosened, just holding me for a moment.

His grip loosened enough for me to slip out of reach.

His grip loosened, and I broke away for a second.

After another moment her grip on his hand had loosened enough for him to pull away.