unconceivable

adjective
un·​con·​ceiv·​able | \ˌən-kən-ˈsē-və-bəl \

Definition of unconceivable 

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Examples of unconceivable in a Sentence

it's unconceivable that a once-promising actor could end up this way

First Known Use of unconceivable

circa 1604, in the meaning defined above

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The first known use of unconceivable was circa 1604

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