verb · Hard SAT word

    Substantiate

    prove with evidence

    Substantiate in a sentence

    The witness failed to substantiate her claims with documentation.

    Synonyms for substantiate

    • prove
    • verify
    • confirm

    Antonyms for substantiate

    Practice substantiate on real SAT questions

    Vocabulary like substantiate appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.

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