So big, so strange, or so extreme that your mind cannot make a picture of it. You use it when a thing is beyond what a normal person can hold in their head: unimaginable wealth, unimaginable pain, unimaginable cruelty.

So big, so strange, or so extreme that your mind cannot make a picture of it形容一個東西大到、怪到、或誇張到你腦袋根本畫不出它的樣子。You use it when a thing is beyond what a normal person can hold in their head當一個東西超出一般人腦袋能裝下的範圍時就會用它：unimaginable wealth, unimaginable pain, unimaginable crueltyunimaginable wealth（難以想像的財富）、unimaginable pain（難以想像的痛苦）、unimaginable cruelty（難以想像的殘忍）。

Notice that it goes with both wonderful things and terrible things — the word itself does not say good or bad, only "too much for the imagination". In real speech it is a strong word people use to show feeling, not a careful measurement.

Notice that要注意 it goes with both wonderful things and terrible things它可以用在很棒的事，也可以用在很糟的事上——the word itself does not say good or bad這個字本身不表示好或壞， only "too much for the imagination"只表示「多到超出想像力」。In real speech在實際的口語裡， it is a strong word people use to show feeling它是一個用來表達強烈感受的字， not a careful measurement而不是精確的度量。

When a reporter says the damage was unimaginable, they do not mean it is literally impossible to imagine; they mean it is shocking, more than anyone expected.

When a reporter says the damage was unimaginable當記者說損害是 unimaginable 的時候， they do not mean it is literally impossible to imagine他們不是說這真的完全無法想像； they mean it is shocking, more than anyone expected他們的意思是這很驚人，超出所有人的預期。

There is a second, cooler use meaning "impossible to believe would happen": "Twenty years ago, a phone like this was unimaginable." Here it is talking about what people at the time could not have predicted.

There is a second, cooler use meaning "impossible to believe would happen"還有第二種比較冷靜的用法，意思是「難以相信會發生」： "Twenty years ago, a phone like this was unimaginable."像 "Twenty years ago, a phone like this was unimaginable."（二十年前，這樣的手機是難以想像的）。Here it is talking about what people at the time could not have predicted這裡講的是當時的人根本無法預料到的事。