pre*pos"ter*ous*ly
Webster's Dictionary (GCIDE)
Preposterous \Pre*pos"ter*ous\, a. [L. praeposterus; prae before + posterus coming after, latter. See Posterior.] [1913 Webster]
1.Having that first which ought to be last; inverted in order. [Obs.] [1913 Webster]
The method I take may be censured as preposterous, because I thus treat last of the antediluvian earth, which was first in the order of nature.— Woodward.[1913 Webster]
2.Contrary to nature or reason; not adapted to the end; utterly and glaringly foolish; unreasonably absurd; perverted. "Most preposterous conclusions." --Shak. [1913 Webster]
Preposterous ass, that never read so far!— Shak.[1913 Webster]
Syn: Absurd; perverted; wrong; irrational; foolish; monstrous. See Absurd. [1913 Webster] -- Pre*pos"ter*ous*ly, adv. -Pre*pos"ter*ous*ness, n. [1913 Webster]