dumbstruck
adj. 被嚇得目瞪口呆的,嚇得發懵的
If you are dumbstruck, you are so shocked or surprised that you cannot speak.
We were dumbstruck. We just couldn't believe our eyes when she appeared.
我們驚呆了。她出現時我們簡直不敢相信自己的眼睛。
He was dumbstruck at the news.
聽了那個訊息,他驚得目瞪口呆.