V2 Vocabulary Building Dictionary
Definition: 1. to confirm or validate something, especially in official form; 2. to prove or serve as evidence for
Synonyms: affirm, validate, authenticate, substantiate, testify (for), verify, corroborate
Tips: Attest comes from the Latin word attestari, which means "to be a witness to or to bear witness." Think of the related word testify. Attest is often used in this exact way today: I can attest to...his whereabouts, her talented abilities, his qualifications for the job, etc. Attest is also used to affirm something to be true, correct, or genuine. Attest is similar in meaning to assert, affirm, aver, and avow (all "a" words). To assert means "to declare boldly and forcefully." To affirm means "to state with conviction" because you believe strongly in the truth of the statement. Aver means "to state confidently," as you have verified the truth and veracity of your statement, and you know it to be 100% certain. To avow is "to state, and often to admit, guilt or culpability."
I can attest to his being there; he is telling the truth. (testify, verify)
The before and after pictures attest to the designer's skills in home redecorating. (affirm, substantiate)
Our client's happiness attests to a job well done. (affirms, testifies)
The defendant's lawyer tried to find a witness to attest to his client's alibi. (substantiate, corroborate, testify)
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