unpremeditate

And if, as happened to our companion (the present Cornell don), you have no special taste for a plump landlord breathing passionately and genially upon your very cheek while you strive to satisfy a legitimate appetite, you may burst into a sudden unpremeditate but uncontrollable screech of mingled laughter and dismay, meanwhile almost falling backward in your chair in an effort to evade the steady pant and roar of those innumerable gutturals.

Plum Pudding Of Divers Ingredients, Discreetly Blended & Seasoned Christopher Morley 1923