tamper with

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

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

Related Words

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