1. (

• confirm ,
• corroborate ,
• sustain ,
• substantiate ,
• support ,
• affirm

) establish or strengthen as with new evidence or facts; "his story confirmed my doubts"; "The evidence supports the defendant" ;

2. (

• affirm ,
• verify ,
• assert ,
• avow ,
• aver ,
• swan ,
• swear ,

) to declare or affirm solemnly and formally as true; "Before God I swear I am innocent" ;

3. (

• affirm ,

) say yes to ;