He tried to think where the earlier sound had come from, but the echoes made that impossible.

This production makes that impossible, for which he is grateful.

You are old already to begin your training, and soon the weather will make travel impossible.

This person must, indeed, be swept out of the way and made impossible.

However, medical problems made that impossible and he sold the property in 1983.

I could have taken a leave of absence, but economic need made that impossible.

Anger sometimes makes that impossible, as I was well aware.

Thus, any secret attack by boats could be made impossible.

And then she realized something that made this all impossible.

He wanted to believe, but the lies her mother had set in motion made that impossible.