attest

[uh-test] / əˈtɛst /

VERB

affirm, vouch for

Synonyms

STRONGEST

authenticate corroborate demonstrate indicate substantiate swear verify

STRONG

adjure announce argue assert aver certify confirm countersign declare display exhibit prove ratify seal show support sustain testify uphold warrant witness

WEAK

asseverate bear out bear witness give evidence

Antonyms

STRONGEST

conceal disprove hide

STRONG

abstain contradict cover deny disavow discredit invalidate oppose refuse reject repudiate veto withhold

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Plenty of millennials who are now adults will attest to its success.

From Los Angeles Times • May 27, 2026

I don’t know Justice Thomas, but all who do attest to the man’s cheerfulness and affability.

From The Wall Street Journal • Apr. 22, 2026

Hugo and his fellow Year 10 French students can attest to the success of this method.

From BBC • Apr. 18, 2026

It isn’t that “V-shaped” rebounds like what investors just witnessed don’t happen — they clearly do, as anybody who held on through last April’s tariff tantrum can no doubt attest.

From MarketWatch • Apr. 16, 2026

I was lawyerly and also veered toward dictatorial, as my brother, who often got ordered out of our shared play area, would attest.

From "Becoming" by Michelle Obama

Vocabulary lists containing attest

100 SAT Words Beginning with "A"

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Posted

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The Ancient Period, Before 600 BCE

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