to be flustered; to lose one's presence of mind
急な質問にうろたえた。
I was flustered by the sudden question.
突然の質問に狼狽えて、うまく答えられなかった。
Flustered by the sudden question, I couldn't answer well.
彼女は電話を受けてからずっと狼狽えている。
She has been flustered ever since she received the phone call.