Sentence:  No gentleman thinks it is safe or prudent to send a servant with a message, without repeating it more than once, and endeavouring to put it into terms brought down to the capacity of the bearer; yet, after all this care, it is frequent for servants to <WSD>mistake</WSD>, and sometimes occasion misunderstandings among friends ... 
Meaning of the word marked with <WSD> tags:  To commit an unintentional error; to do or think something wrong.