Even the moon and stars found the blanket of fog impenetrable.

What had begun as'a mist was now an impenetrable fog.

What had begun as a mist was now an impenetrable fog.

I heard a great rumbling through the impenetrable fog before me.

After the last week, Kate would take a nice, peaceful, impenetrable fog any day.

It would go off every five minutes and blanket everything in an impenetrable fog.

For a time the stranded crew were surrounded by an impenetrable fog.

All the impenetrable fog of knowledge that her sick mind was making up.

The sky was impenetrable, silver fog everywhere, and he found himself thinking of Lexie.

I asked, the impenetrable fog now like a cold wet invisible hand brushing up against my face there in the night.