preposterous

Absurd, or contrary to common sense.

Adjective

Absurd, or contrary to common sense.
- [...] I did incounter that obſeene and moſt prepoſterous euent that draweth frõ my ſnowhite pen the ebon coloured Incke, which here thou vieweſt, beholdeſt, ſuruayeſt, or ſeeſt. [...] There did I ſee that low ſpirited...
- So I am to send Mrs. Churchill down to the very spot where a treasonable correspondence is most easily managed; and by the ease with which she gets out of a first scrape, give her all possible encouragement to get into...
- In the case of the misseltoe, which draws its nourishment from certain trees, which has seeds that must be transported by certain birds, and which has flowers with separate sexes absolutely requiring the agency of...

From Latin praeposterus (“with the hinder part before, reversed, inverted, perverted”), from prae (“before”) + posterus (“coming after”).