Sentence:  A girl of the village ... came and rang at my bell as soon as it was light ... perfectly maddened with an aching tooth. ... The poor thing begged me with tears in her eyes to take out her <WSD>tormentor</WSD>, if I dragged her head off. 
Meaning of the word marked with <WSD> tags:  One who torments; a person, animal, or object that causes suffering.