Tamper

Part of speech: noun (n.)

1. One who tamps; specifically, one who prepares for blasting, by filling the hole in which the charge is placed.

2. An instrument used in tamping; a tamping iron.

Part of speech: verb (v.)

1. To meddle; to be busy; to try little experiments; as, to tamper with a disease. 'T is dangerous tampering with a muse. Roscommon.

2. To meddle so as to alter, injure, or vitiate a thing.

3. To deal unfairly; to practice secretly; to use bribery. Others tampered For Fleetwood, Desborough, and Lambert. Hudibras.