Complete the following statements with proper words or expressions according to the course book.Fortuitous formerly denoted 'happening by chance', 'accidental' and later took on the meaning 'fortunate' probably by ( ) because the two words look similar.
【正确答案】：ANALOGY
【题目解析】：fortuitous原义为“偶尔发生的”，后来可能是通过类比获得“幸运的”之意，因为该词与fortunate形式上很像。
