As far as I know, the predominant wish of students leaving school is to enjoy life.

predominant 由前缀 pre-（表示"在前"）和 dominant（主导的）组成，字面意思是"在主导地位之前的"，引申为"主要的、占优势的"。 这个词描述的是在众多愿望中最为突出、占据主导地位的那个愿望。