Affirm - (Webster's 1828 Dictionary)
AFFIRM, v.t. afferm' [L. affirmo; ad and firmo, to make firm. See Firm.]
1. To assert positively; to tell with confidence; to aver; to declare the existence of something; to maintain as true; opposed to deny.
Of one Jesus whom Paul affirmed to be alive. Acts 25.
2. To make firm; to establish, confirm or ratify; as, the Supreme court affirmed the judgment.
AFFIRM', v.i. To declare solemnly before a court or magistrate, for confirming a fact, or to have an affirmation administered to, by way of confirmation, or as a substitute for an oath; as, the witness affirmed to the fact, or he was affirmed to the fact.