Tamper is a term that refers to the act of interfering with something in an unauthorized or illegal way. FIDDLE, ALTER, BRIBE, INTERFERE, MESS, MEDDLE, and monkeywith are all words that can be used to describe different forms of tampering. FIDDLE is a six-letter word meaning to make small changes or adjustments to something. ALTER is a five-letter word meaning to change something in a significant way. BRIBE is a five-letter word meaning to offer money or other incentives in exchange for a favor or advantage. INTERFERE is a nine-letter word meaning to get involved in something without permission or invitation. MESS is a four-letter word meaning to make something untidy or disorganized. MEDDLE is a six-letter word meaning to INTERFERE in something that does not concern you. Monkeywith is a ten-letter word meaning to tamper with something in a playful or mischievous way.