proot

He gave some clacks that sounded negative, and said something like 'P-p-p-proot.'

A Martian Odyssey Stanley Grauman Weinbaum 1918

And that was just the beginning; I was always 'Tick,' but as for him -- part of the time he was 'Tweel,' and part of the time he was 'P-p-p-proot,' and part of the time he was sixteen other noises!

A Martian Odyssey Stanley Grauman Weinbaum 1918

The county prison is built of brick, stone, iron and wood, and is fire proot.

First Annual Report of the Board of Public Charities of North Carolina. February, 1870 North Carolina Board of Public Charities 1870

Cor. 14, v. 3: yyita expUcaturt quod unns & idem y, Dei pluraliter uottiiDatur, proot

Analysis operum S.S. patrum et scriptorum ecclesiasticorum 1790