心烦意乱的英语是 "frustrated" 或 "discouraged". 这两个词都表示一种沮丧、不满的情绪。

"Frustrated" 来源于拉丁语 "frustratus"，意思是 "to deceive" 或 "to disappoint". "Discouraged" 来源于法语 "decourager"，意思是 "to deprive of courage".

下面是一些例句：

I'm feeling frustrated because I can't figure out how to solve this problem.

She was discouraged by the lack of progress she was making.

He was frustrated by the constant interruptions during his presentation.

She felt discouraged after failing her driving test.

在这些例句中，"frustrated" 和 "discouraged" 都表示一种沮丧、不满的情绪。