the world > action or operation > doing > activity or occupation > acting in another's business or intervention > intervene between [verb (transitive)] > interfere in or meddle with > tamper with (2)
transitive. To tamper with (a thing). Obsolete.
intransitive. colloquial (originally U.S.). To play mischievous or foolish tricks. Also: to fool or mess about or around; to tinker, tamper, or…