bewilder

The complex instructions for assembling the computer seemed to bewilder the elderly man.

(Chinese) 组装电脑的复杂说明似乎让那位老人感到非常困惑。

A sudden change in the rules of the game will likely bewilder the new players.

(Chinese) 游戏规则的突然改变可能会让新玩家感到不知所措。