不幸的副词是Unfortunately。

unfortunately：

adv.不幸地;遗憾地;可惜地;可悲地；

比较级： more unfortunately最高级： most unfortunately

Unfortunately, the people making the decisions are out of touch with the real world.

令人遗憾的是，制订决策的人不了解实情。

Unfortunately, I won't be able to attend the meeting.

真可惜我不能参加这次会议。

Unfortunately, my father is no soft touch.

可惜，我父亲并非有求必应。

Unfortunately they ran into a snowstorm along the way.

他们不幸在途中遇上了暴风雪。