Complete the following statements with proper words or expressio

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。