attest

verb

1. 1

   authenticate, affirm to be true, genuine, or correct, as in an official capacity

   I attest this signature

2. 2

   establish or verify the usage of

   This word is not attested until 1993

3. 3

   provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes

   His high fever attested to his illness

   The buildings in Rome manifest a high level of architectural sophistication

4. 4

   give testimony in a court of law