affirmative
US /əˈfɝː.mə.t̬ɪv/
UK /əˈfɝː.mə.t̬ɪv/

1.
agreeing with or consenting to a statement or request
:
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Her answer was an affirmative nod.
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The committee gave an affirmative vote on the proposal.
2.
asserting that a fact is so; positive
:
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The evidence was affirmative that he was present at the scene.
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We need to take affirmative action to address this issue.
1.
an affirmative word or statement; a 'yes'
:
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He responded with a clear affirmative.
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The signal was an affirmative, so we proceeded.