noun
affidavit
af-uh-DAY-vit/ˌæfəˈdeɪvɪt/
A written statement sworn to be true and used as legal evidence.
The witness signs an affidavit while taking an oath before the official.

Etymology
'Trust' underlies the verb meaning 'make an oath.' The legal noun comes from the formula 'he has stated on oath,' which opened sworn statements.
In context
we go to the police and the bank and file a sworn affidavit stating that you never signed that power of attorney
More examples
- Several affidavits supported the claim.
- She submitted an affidavit.
- The affidavit described what he saw.
Forms
affidavit · affidavits
Similar words
- statement
- A declaration without necessarily an oath.
- deposition
- Sworn testimony taken through questioning.