She was impeded by her own Shield Charm; by the time she had removed it he had already stormed into the night.
He thought he could make out an enormous arm waving from the midst of the spider swarm, but as he made to chase after them, his way was impeded by a monumental foot, which swung down out of the darkness and made the ground on which he stood shudder.
There are no more uses of "impede" in the book.
Show samples from other sources
She is impeding the progress of our project
But the hill was treacherously steep; he was impeded by the snow and his own lack of strength.