Sentence:  DON JOHN. ("talking of the alleged "vile encounters" of Hero with her lover") / Fie, fie! they are not to be nam'd, my lord, / Not to be spoke of; / There is not chastity enough in language / Without offence to utter them. Thus, pretty lady, / I am sorry for thy much <WSD>misgovernment</WSD>. 
Meaning of the word marked with <WSD> tags:  Failure to restrict oneself; improper behavior; misconduct.