Tamper

Tamper can mean:

To make unauthorised alterations to something. Products can be made tamper-evident to protect againt tampering.
A ballast tamper, a machine that tamps track ballast.
In nuclear weapon design, a shell surrounding the fission core and keeping the nuclear material assembled during the explosion for longer time, raising yield.
A tool with a long handle (usually wooden) and a flat metal head, used in a "stomping" type motion to flatten ground, gravel or other type of materials, for gardening or landscaping tasks.

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