insoluble , insol. (abbreviation) AmE , insol (abbreviation)

According to these, the problem was difficult but not insoluble.

I like them because several of the more famous seem insoluble.

And even if they were, their very use causes insoluble problems.

These were matters which she had long ago put away in the back of her mind as insoluble.

His business was in financial difficulties, but they do not seem insoluble.

He was not, however, the man to puzzle himself for long over any insoluble problem.

I should have realized that to God there are no insoluble problems.

The problem may be insoluble, but there are easier ones to face.

I gave the whole thing up as insoluble, and determined to give it no more thought.

Its color ranges from blue to green and is insoluble in water.

This was to be an insoluble dilemma in the coming years.

"I could name you five insoluble problems right off the top of my head.

Such points pass with most men for settled as insoluble, after a time.

More important, it took his mind off the all but insoluble problems with Margaret.

If the answer does not lie there, then the problem is indeed insoluble.

I did not point out to him that his own rules presented me with an insoluble problem.

The only real insoluble problem he could see was Peg.

The problem is not insoluble, but requires some further careful study.

But there is a difference between a confusing experience and an insoluble problem.

Woman's heart and mind are insoluble puzzles to the male.

Sometimes the problems of its individual residents seem overwhelming and insoluble.

But the problem obviously is insoluble until they face up to that necessity.

The one insoluble problem, he said, was the leader in Belgrade.

She is, I fear, what we call an insoluble problem, which being interpreted means a bit of human nature.

The problem would be insoluble if the players were regularly partners.