Synonyms of preposterous in English:

preposterous

adjective

  • outrageous, shocking, astonishing, monstrous, unbelievable, incredible, unthinkable
    informal crazy
    [Antonyms] reasonable, sensible
  • Definition of preposterous in:

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    Word of the day noisome
    Pronunciation: ˈnɔɪs(ə)m
    adjective
    having an extremely offensive smell