To give evidence or bear witness, especially under oath in a legal proceeding; to serve as evidence or proof of something through personal statement or demonstration.
From Latin 'testificari,' combining 'testis' (witness) and 'facere' (to make). The word literally means 'to make witness' or 'to act as a witness,' emphasizing the active role of providing evidence.
The word literally means 'to make witness' - so when someone testifies, they're not just speaking, they're actively creating witness evidence, transforming their knowledge into legal or factual proof!
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