attest

Meanings

• provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
  • "His high fever attested to his illness"
• authenticate, affirm to be true, genuine, or correct, as in an official capacity
  • "I attest this signature"
• give testimony in a court of law
• establish or verify the usage of
  • "This word is not attested until 1993"

Synonyms

bear witness, certify, demonstrate, evidence, manifest, take the stand, testify