The term 'THIS MEANT NOTHING TO NERO' can be summarized by the crossword solution NIHIL, which is a Latin word meaning nothing or emptiness. It is derived from the ancient Roman Emperor Nero, who famously declared that 'what is popularly called fate is nothing more than the empty name of a cause unknown to us'. This phrase has become a popular expression of nihilism, which is the belief that life is meaningless and that nothing matters.