The term 'MORE NASTY' can be broken down into two crossword solutions: VILER (5 letters) and MEANER (6 letters). VILER is an adjective meaning 'more morally reprehensible or odious than usual; more despicable or contemptible'. MEANER is an adjective meaning 'unpleasantly aggressive or spiteful in behavior or attitude; malicious'. Both words are used to describe someone or something that is more unpleasant, offensive, or cruel than usual.