How to pronounce AFFIDAVIT. How to say AFFIDAVIT.An affidavit is a written statement that you swear is true and that may be used as evidence in a court of law. A written declaration upon oath made before an authorized official. Definitions of 'affidavit'. An affidavit is a written statement which you swear is true and which may be used as evidence in a court of law. This video shows you How to Pronounce Affidavit, pronunciation guide. "affidavit". Listen to the audio pronunciation again. Having trouble hearing a pronunciation? The term is pronounced as "afuhDAYvit.