是代词，意思是：（用于指身份不确定的某个或某类人，可作从句主语或宾语）无论谁，任何人.
例句:
Whoever wins this year is going to be famous for life.(今年无论谁获胜都将名留青史。)
Whoever was responsible for this crime is a dangerous man.(制造这起罪案的人，无论是谁，都是一位危险人物。)
We should be free to negotiate with whoever we want.(无论想与谁谈判，我们都应该有与之谈判的自由。)