Affirms

To agree, verify or concur; to answer positively.

"She affirmed that she would go when I asked her."

To assert positively; to tell with confidence; to aver; to maintain as true.

To support or encourage.

"They did everything they could to affirm the children's self-confidence."

To make firm; to confirm, or ratify; especially to assert or confirm, as a judgment, decree, or order, brought before an appellate court for review.