If you are dumbfounded, you are so surprised that you cannot think or speak for a beat. The face is often still; the mouth may be open.

If you are dumbfounded如果你 dumbfounded（呆住了），you are so surprised你太驚訝了，that you cannot think or speak for a beat以至於有那麼一下子沒辦法思考或說話。The face is often still臉常常是靜止的；the mouth may be open嘴巴可能張著。

It is a feeling word, a bit formal or story-like, but people do say it in real life when the surprise is huge — a gift, a score, bad news, something that should not be possible. It is the usual everyday form of this family: we say I was dumbfounded far more than anyone dumbfounded me.

It is a feeling word它是一個表達感覺的字，a bit formal or story-like有點正式或說故事的感覺，but不過 people do say it in real life人們現實生活中真的會這樣說，when the surprise is huge當驚訝程度很大時——a gift, a score, bad news, something that should not be possible像是一份禮物、一個分數、壞消息，或某件照理不該發生的事。It is the usual everyday form of this family它是這個字家族裡最常用的日常形式：we say I was dumbfounded far more than anyone dumbfounded me我們說『I was dumbfounded』遠比說『anyone dumbfounded me』常見得多。

Though actually it is not quite the same as scared. You can be dumbfounded by something wonderful.

Though actually不過其實，it is not quite the same as scared它跟 scared（害怕）不完全一樣。You can be dumbfounded你可以因為很棒的事 by something wonderful而 dumbfounded。

And it is not ‘feeling stupid’, even though dumb sits inside it; the old piece means you have gone wordless.

And而且 it is not 'feeling stupid'它不是「覺得自己很笨」，even though dumb sits inside it雖然 dumb 這個字就藏在裡面；the old piece means you have gone wordless這個古老的部分意思是你變得說不出話。