Sentence:  Just as I take the chance that your <WSD>tarse</WSD> is as crooked as your soul.” His mouth twitched in amusement. “'Tis straight and strong, as you will likely soon learn. However, you bargained only for my arm and my horse, not my <WSD>tarse</WSD>. 
Meaning of the word marked with <WSD> tags:  The penis.