unsubstantiated

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adjective un·sub·stan·ti·at·ed \ˌən-səb-ˈstan(t)-shē-ˌā-təd\

Definition of unsubstantiated

  1. :  not proven to be true :  not substantiated an unsubstantiated rumor/report a plausible but unsubstantiated theory

First Known Use of unsubstantiated

circa 1775



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to fight against or to call in question

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