[no obj.](tamper with)interfere with (something) in order to cause damage or make unauthorized alterations 做手脚;破坏 someone tampered with the brakes of my car. 有人在我汽车的刹车上做了手脚。
noun
a person or thing that tamps something down, especially a machine or tool for tamping down earth or ballast 夯工;打夯机
派生 tamperer noun 语源
mid 16th cent. (in the sense 'busy oneself to a particular end, machinate'): alteration of the verb temper