The term is pronounced as "afuhDAYvit. " Breaking it down: "af" as in "after," "uh" as in "umbrella," "DAY" with emphasis, and "vit" rhymes with "fit.""affidavit". Listen to the audio pronunciation again. Having trouble hearing a pronunciation? This video from Summit Legal Aid, formerly Laurel Legal Services, explains how to complete and file an Affidavit of Service in a custody proceeding. This video shows you How to Pronounce Affidavit, pronunciation guide. A written statement that someone makes after promising officially to tell the truth. An affidavit can be used as proof in a law court. A written declaration upon oath made before an authorized official. How to pronounce AFFIDAVIT.