The term 'fell sharply' can be summarized by the crossword solution of 'poleaxe, ' which is a seven-letter word. A poleaxe is a type of weapon that was used in medieval times, consisting of an axe head mounted on a long wooden shaft. It was used to deliver powerful blows and could cause serious damage to an opponent. The phrase 'fell sharply' is often used to describe a sudden and dramatic decrease in something, such as a stock market index or a company's profits.