Pronunciation: /əˈtɛstɪd/
verb to bear witness to; certify; declare to be correct, true, or genuine
A1 She attested that she saw the accident happen.
A2 The witness attested to the defendant's alibi.
B1 The documents were attested by a notary public.
B2 The authenticity of the painting was attested by experts.
C1 The archaeologist attested the age of the artifact through carbon dating.
C2 The scientist's research findings were attested by multiple peer-reviewed studies.
formal The authenticity of the document was attested by multiple witnesses.
informal I can attest that the party was a lot of fun.
slang I swear on my life, I attested to seeing the ghost in that old house.
figurative His dedication to his work attested to his strong work ethic.
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