tamper with

1. Interfere or meddle, especially in a harmful way. For example, If you tamper with that lock it's sure to break . [c. 1600]

2. Engage in improper or secret dealings, as in He was accused of tampering with the jury . [c. 1600]

Example Sentences

There’s no worrying about that now that teams can tamper with the balls again.

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The e-passport includes a small chip that stores biometric information, making it harder to forge or tamper with the document.

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The most plausible answer, of course, is that Luke’s account was finished before their deaths and no one in subsequent decades felt sufficiently bold to tamper with it.

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The new passports will also feature updated security features, the Home Office said, including the latest anti-forgery technology - making them "harder to forge or tamper with".

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Four meant that he might jump with a hostage, and this signaled: Do not tamper with the gear.

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Related Words

• batter 
• break 
• burn 
• contaminate 
• harm 
• hurt 
• impair 
• infect 
• injure 
• maim 
• mangle 
• mar 
• pollute 
• ravage 
• ruin 
• scorch 
• smash 
• tarnish 
• tear 
• undermine