intractable

Traits such as “superposition” and “entanglement,” when combined with “interference,” have the potential to solve problems in science and industry that are otherwise intractable, even to state-of-the-art supercomputers.

The real problem—a problem that thus far has proven intractable—is overcoming the doubt and fear.

Some express a feeling of hopelessness and that their intractable sadness will never abate.

Unfortunately, this new study shows how intractable that problem truly is.

The symptoms can show up as a wide array of intractable health problems.

On the left, many see it as a civil rights issue–potentially ameliorating the problem of intractable poverty.

But on the subject of the foreign troops Hartington in one House and his father in the other were intractable.

On the other hand they were likely to prove intractable and ungovernable, and many preferred even suicide to servitude.

A gallows was erected in the court, where the intractable underwent capital punishment as a warning to the rest.

Nevertheless it would surprise those acquainted only with fresh water ice to find how tough, sticky and intractable is sea-ice.

This fellow, Lopez, had absolutely been allowed to make a good score off his own intractable disobedience.