tamper
verbUK /ˈtæm.pər/
US /ˈtæm.pɚ/
To touch or change something you should not touch.
Someone tried to tamper with the lock on the door.
OTHER MEANINGS
2. To change something secretly so it stops working correctly.
The thief tampered with the alarm system.
3. To try to influence someone or something in a dishonest way.
They were accused of tampering with the evidence.
4. A heavy tool used to pack down earth or stones.
The worker used a tamper to flatten the gravel.