COMB in N-COUNT (与指人的名词连用,构成复合名词)表示“主要的”,“最重要的”Arch- combines with nouns referring to people to form new nouns that refer to people who are extreme examples of something. For example, your arch-rival is the rival you most want to beat. (与指人的名词连用,构成复合名词)表示“主要的”,“最重要的”
Neither he nor his arch-rival, Giuseppe De Rita, won.