improbable - definition and synonyms

adjective 

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/ɪmˈprɒbəb(ə)l/
  1. 1
    not likely to happen or to be true

    a rather improbable story

    it is improbable (that):

    It’s improbable that a lawyer would give such advice.

    highly improbable:

    It seemed highly improbable he would return to work.

  2. 2
    strange and unexpected

    an improbable friendship between two women of very different backgrounds

derived word

improbably

adverb