to declare or affirm something to be true, usually in a formal statement.

सत्य बताना

English Usage: The witness will attest to the facts during the trial.

Hindi Usage: गवाह ट्रायल के दौरान तथ्यों का सत्य बताएगा।

a statement made by someone, especially in a legal context, to confirm something.

गवाही

English Usage: His attest of the event was crucial for the investigation.

Hindi Usage: उसकी घटना की गवाही जांच के लिए महत्वपूर्ण थी।