突然の質問に彼はすっかり狼狽えてしまった。
He was completely flustered by the sudden question.
地震が起きても狼狽えずに、まず火を消してください。
Even if an earthquake hits, don't panic; put out any fires first.
嘘がばれそうになって、彼女は明らかに狼狽えていた。
She was visibly flustered when her lie was about to come out.