impossible

Past research suggests the planet may have active volcanism and may have once been home to shallow oceans, but the inability to map the surface optically has made it impossible to verify these theories so far.

Which is impossible unless people talk publicly rather than letting each crime be its own isolated incident.

But an ad-supported version of Desert Golfing was impossible.

It is impossible to calculate the full effect that watching this on television, listening on the radio must have had on Sam.

Aside from a blanket ban, social media platforms like Twitter, Facebook, and Reddit are nearly impossible to control.

Memorable songs that are impossible to get out of your head?

Adequate conception of the extent, the variety, the excellence of the works of Art here heaped together is impossible.

But what might have been very practicable for eight hundred and sixty men, was impossible for three hundred and sixty.

It is impossible to believe that thus far it is anything but a sketch and intimation of what it will presently be.

On the other hand, I could not bring myself by lengthy or impossible quotations to vilify Duns.

This is secured only by right objects of thought; it is impossible to reach it by voluntary mechanics.