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. (

• testify ,
• bear_witness ,
• prove ,
• evidence ,
• show

) provide evidence for; "The blood test showed that he was the father"; "Her behavior testified to her incompetence" ;

3. (

• tell ,
• evidence ,

) give evidence; "he was telling on all his former colleague" ;