unutterable

1. ADJ You can use unutterable to emphasize that something, especially a bad quality, is great in degree or intensity. 非常(坏、糟糕)的[书面] [ADJ n]

...unutterable rubbish. ...绝对的垃圾。

2. unutterablyADV

I suddenly felt unutterably depressed. 我忽然感到无法言说的压抑。