This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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verb-intransitive. To interfere in a harmful manner: tried to tamper with the decedent's will; tampering with the timing mechanism of the safe.

verb-intransitive. To tinker with rashly or foolishly: Don't tamper with my feelings.

verb-intransitive. To engage in improper or secret dealings, as in an effort to influence: tamper with a jury. See Synonyms at interfere.

v. To alter improperly.

n. A neutron reflector in an atomic bomb that also delays the expansion of the exploding material, making possible a longer-lasting, more energetic, and more efficient explosion.

n. A person or thing that tamps.

n. A tool used to tamp down tobacco in a pipe.

v. To alter by making unauthorized changes; to meddle.

v. To discuss future contracts against league rules with a player.

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

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

verb-intransitive. To meddle; to be busy; to try little experiments.

verb-intransitive. To meddle so as to alter, injure, or vitiate a thing.

verb-intransitive. To deal unfairly; to practice secretly; to use bribery.

To experiment rashly; busy one's self unwisely or officiously; meddle: usually followed by with in this and the other senses.

To interfere, as for the purpose of alteration; make objectionable or unauthorized changes (in): as, to tamper with a will or other document.

To use secret or underhand measures; exert unfair or corrupt influence; especially, to use improper persuasions, solicitations, bribery, etc.

n. One who tamps, or prepares for blasting by stopping the hole in which the charge is placed.

n. An instrument used in tamping; a tamping-bar or tamping-iron.

v. intrude in other people's affairs or business; interfere unwantedly

n. a tool for tamping (e.g., for tamping tobacco into a pipe bowl or a charge into a drill hole etc.)

v. play around with or alter or falsify, usually secretively or dishonestly

"With hardware you can create what we call a tamper-resistant security module."

tampered    tampering    tampers   

intervene    interpose    step in    interfere    manipulate   

tampered    tampering   

meddle    interpose   

camper    damper    hamper    pamper    scamper    stamper   

erase    obtrusion    side-effect    keypads    boy    vandalism    readjustment    misdirection    misrepresentation