In 'in-vert ,in is the prefix and vert is the root
Well in the book he thinks about how easy it was when he was with the boys and how easy it was compared to how he does nothing but work now
Leave no rubs nor botches in the work,” which again indicates the inner conflict and guilt that disturbs him. Shakespeare repeats the use of irony in Scene II when he shows Macbeth hiding his plan of murdering Banquo and Fleance from his wife, who persuaded him to kill Duncan and do whatever it takes to become king.