She is so brave, Sansa thought, galloping after her ... and yet, her doubts still gnawed at her.

Fear and doubt gnawed at Alastair.

Even now, when the creature who held them all in cold letter must be securely locked and guarded, a fearful doubt yet gnawed at their hearts.

The doubts gnaw at his gut, driving him to despair.

A nameless doubt gnawed at his mind as he moved noiselessly towards the garbage bin beneath the sink.

His own doubts gnawed at him.

The doubts and fears gnawed at her innards.

Human doubts and insecurities gnawed at such restraints, chafing at reasonableness.

Then he fled to Barahir, and of companions his he was the most fierce and desperate; but doubt gnawed his heart, thinking that perhaps Eilinel was not dead.

That both were his he could not deny, even now that doubt gnawed.