fidget,
play around, pick at, twiddle, toy, jiggle, play
antonym: leave
alone
defraud,
swindle, cheat, con, diddle (slang), deceive, hoax
meddle
(disapproving), tamper, interfere, mess around (informal), mess, play, play
around, mess about (UK, informal)
antonym: leave
alone
falsify,
doctor, tamper with, manipulate, fix, cook the books (slang)
tinker,
manipulate, adjust, jiggle, play with, retune
antonym: leave
alone