Preposterous

Antonyms of PREPOSTEROUS

judicious, consistent, plausible, prudent, unquestionable, sane, indisputable, substantial, certain, sound, logical, possible, reasonable, credible, true, demonstrable, sapient, intelligent, tenable, indubitable, sage, incontrovertible, smart, established, valid, practical, believable, incontestable, undeniable, good, bad, responsible, poor, sagacious, earnest, balanced, realistic, serious, demonstrated, well-advised, sensible, wise, rational, infallible, plain, conceivable.