sextuply

Then I read, and re-read, and re-re-read, and quadruply, quintuply, and sextuply re-read my epistle, until I had it all by heart, and then continued to re-read it for the sake of the penmanship.

The Atlantic Monthly, Volume 18, No. 108, October, 1866 Various

What is happening is that a stream of low-voltage electrons -- cathode rays -- in great quantity are meeting great quantities of sextuply ionized oxygen.

The Ultimate Weapon John Wood Campbell 1940

He's developed a system, which, thanks to the power we can get in that atostor, will sextuply ionize oxygen gas.

The Ultimate Weapon John Wood Campbell 1940

Then I read, and re-read, and re-re-read, and quadruply, quintuply, and sextuply re-read my epistle, until I had it all by heart, and then continued to re-read it for the sake of the penmanship.

Passages from the American Notebooks, Volume 2. Nathaniel Hawthorne 1834

"All by themselves, those sextuply ionized oxygen atoms would have a good bit to say, but they don't really begin to talk till they start roaring for those electrons I'm feeding them.

The Ultimate Weapon John Wood Campbell 1940