When you change the way an electronic item is wired, voiding the warranty, this is an example of a situation where you tamper with the product.
- to make secret, illegal arrangements with, as by bribing
- to interfere with or meddle with, esp. so as to damage, corrupt, etc.
Idioms and Phrasal Verbs
Origin of tamper
- Probably alteration of temper
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle French temprer (“to temper, mix, meddle")
- tamp +"Ž -er