To provide or serve as clear evidence of something; to declare or certify that something is true or genuine, often based on personal knowledge or observation.
From Latin 'attestari,' combining 'ad-' (to, toward) and 'testari' (to witness, testify). The root 'testis' means 'witness,' so the word literally means 'to witness toward' or provide witness evidence.
The word shares its root with 'testify' and even 'testimony' - they all come from 'testis' meaning witness. When you attest to something, you're literally standing as a witness to its truth!
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