undreamed-of

listen to the pronunciation of undreamed-of
English - Turkish
English - English
Not imagined or expected
much more or much better than you thought was possible
un·dreamed of in BRIT, also use undreamt of emphasis If you describe something as undreamed of, you are emphasizing that it is much better, worse, or more unusual than you thought was possible. This new design will offer undreamed-of levels of comfort, safety and speed They have freedoms that were undreamed-of even ten years ago