1. (

• attest ,
• certify ,
• manifest ,
• demonstrate ,
• evidence

) 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"; "This decision demonstrates his sense of fairness" ;

2. (

• attest

) authenticate, affirm to be true, genuine, or correct, as in an official capacity; "I attest this signature" ;

3. (

• testify ,
• attest ,
• take_the_stand ,
• bear_witness

) give testimony in a court of law ;

4. (

• attest ,

) establish or verify the usage of; "This word is not attested until 1993" ;