the unthinkable something that is impossible to accept or imagine难以想象（接受）的事情:•Then the unthinkable happened and the boat started to sink.接着，难以想象的事情发生了，船开始下沉。•It was the job of the committee to think the unthinkable (=plan for unexpected events or situations) .委员会的工作就是要想到意想不到的情况。 |