Sentence:  Oh, you "are" a devil. You can twist the heart in a girl as easy as some could <WSD>twist</WSD> her arms to hurt her. Mrs. Pearce warned me. Time and again she has wanted to leave you; and you always got round her at the last minute. And you don't care a bit for her. And you don't care a bit for me. 
Meaning of the word marked with <WSD> tags:  To injure (a body part) by bending it in the wrong direction.