"affirms" in the verb sense
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"
say yes to
Source: WordNet® (An amazing lexical database of English)
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