to wrongly think that one person or thing is someone or something else:

Ex:1. A woman mistook him for a well-known actor, and asked him for his autograph. 2.The doctor mistook the symptoms for blood poisoning.

He was mistaken for the minister. 人們錯把他當作牧師了。/ 挑選錯;錯估: It was wise of you not to mistake your own strength. 你沒有錯誤估計自己的力量是明智的。