undreamed-of出人意料的;意料之外的;连做梦也没想到的
Things Undreamed of做梦也想不到的事
ADJ（形容词） If you describe something as undreamed of, you are emphasizing that it is much better, worse, or more unusual than you thought was possible. 做梦都想不到的[强调]
This new design will offer undreamed of levels of comfort, safety and speed.
新的设计将提供做梦都想不到的舒适、安全和速度。