The verses from the Gospel Seryozha knew fairly well, but at the moment when he was saying them he became so absorbed in watching the sharply protruding, bony knobbiness of his father’s forehead, that he lost the thread, and he transposed the end of one verse and the beginning of another.
There are no more uses of "protrude" in the book.
Show samples from other sources
metal spikes protrude from the dog’s collar
operate to repair the muscle wall through which the hernia protrudes