Meanings of distil the water in English

Well, we'll distil and double and triple distil the water.

I say," coming back to earth, "have they begun to distil the water?

Those who are still able to get about can busy themselves with hopefully distilling the water.

The samples were inserted into a processor that distilled the water, stored the distillate, and subjected the filtered-out substances to spectrographic analysis and other tests.