Englishfor English speakers
tamper
Verb
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If something is tampered with, it is changed or altered without permission.
The evidence for this case was tampered with.
There have been allegations that the police tampered with the crime scene.
proof
Noun
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Proof is evidence which shows something is correct.
He has proof that he was not at the crime scene. A witness says that they were somewhere else.
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A proof can show how a theorem is correct.