insoluble

Bennett says the conflict with the Palestinians is “insoluble” and sounds almost happy about it.

In other words, they were not going to let the most insoluble problems trump what could be achieved.

Worrying about Yemen is a way not to worry about the insoluble problems of Afghanistan and Pakistan.

Crystals of calcium oxalate are insoluble in acetic acid or caustic soda.

It is in this way that lime, which occurs in the soil principally as the insoluble carbonate, is dissolved and absorbed.

Starch is insoluble in cold water, but by boiling, it dissolves, forming a thick paste.

It is a white crystalline fusible solid, insoluble in water, but soluble in alcohol and in solutions of the alkalies.

The greater part of the organic matters are insoluble both in water and acids.