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Witness

/ˈwɪtnəs/

A person who sees an event, typically a crime or accident, and gives an account of it.

Synonyms:

Remember these men here are witnesses to what you say.

He would save himself from witnessing again such permitted, encouraged attentions.

Nowhere else had I witnessed such a scene.

From Old English witnes, meaning attestation of a fact, event, or statement, from wit, meaning knowledge or understanding.

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