Other forms: attested, attests, attesting
To attest is to declare that something is true. Attest to his character, as the records attest, attested by a witness.
It takes to when a person does it and no preposition when a thing does: the ruins attest the fire. Attesting is formal and often written — an attested copy is one certified as genuine. In linguistics, an attested form is one actually recorded rather than reconstructed. Note that the Latin is from testis, a witness.
1verbattestTo declare that something is true.
“Her neighbours attested to her good character in court.”
attest is a declaring true.
Latin attestari is ad plus testis, a witness. Testify, testimony and protest come from the same witnessing.
Proto-Indo-European
*steh₂-
Latin
attestor — to witness to, bear witness
Middle French
attester
English, today
attest
Built from
Borrowed from Middle French attester, from Latin attestor (“to witness to, bear witness”), from at-, combining form of ad (“to”) + testor (“to bear witness”), from testis (“a witness”).
Etymology from Wiktionary, CC BY-SA