rarefying

It is true that the rarefying of pizza can go too far.

Mr. Field assumed that the artisanal food movement, having refashioned cheese, bacon, tofu and peanut butter, would be ready to embrace his ambitious rarefying of the pickle.

If the Kremlin has devised some subtle, inchmeal way to undermine the United States by rarefying our atmosphere, might not a lessened air resistance to the batted ball be the first measurable evidence of such.