Proven; shown to be true with evidence. / Supported with testimony. / Certified as good, correct, or pure. / (linguistics) Of words or languages, proven to have existed by records.

simple past tense and past participle of attest

Third-person singular simple present indicative form of attest

present participle of attest

plural of attestation

attestation

plural of attestment

Supported by a great deal of evidence. / (linguistics) Of words or languages, proven to exist through a large number of examples or copious records.