He was always an unfortunate person, because bad things happened to him all the time.

unfortunate 是由前缀 un-（表示"不、非"）和形容词 fortunate（幸运的）组成的复合词。fortunate 来自名词 fortune（运气、财富），加上形容词后缀 -ate 构成。 unfortunate 字面意思是"不幸运的"，引申为"不幸的、倒霉的"。