tamper with
phrasal verbPart oftamper
tamper with — phrasal verb
1. to make unauthorized changes to or interfere with something, especially in a way
1.phrasal verb
Definition
to make unauthorized changes to or interfere with something, especially in a way that causes damage or prevents correct operation
Example
The investigation found clear signs that the lock had been tampered with.
Saira warned the staff not to tamper with the security system settings.