| verb | provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes “His high fever attested to his illness” |
| verb | authenticate, affirm to be true, genuine, or correct, as in an official capacity “I attest this signature” |
| verb | give testimony in a court of law |
| verb | establish or verify the usage of “This word is not attested until 1993” |
| attestation | noun | the evidence by which something is attested |
| certification | noun | confirmation that some fact or statement is true through the use of documentary evidence |
| manifestation | noun | expression without words |
| demonstrative | adjective | serving to demonstrate |
| evidence | noun | an indication that makes something evident |
| attestant | noun | someone who affirms or vouches for the correctness or truth or genuineness of something |
| attester | noun | someone who affirms or vouches for the correctness or truth or genuineness of something |
| testimony | noun | something that serves as evidence |
| testifier | noun | a person who testifies or gives a deposition |