弄りまわす[ijirimawasu] to tinker with
玩弄[ganrou] make sport of
玩弄物[ganroubutsu] plaything
愚弄[gurou] mockery
飜弄[honrou] trifling with

弄する[rousuru] to play with
弄り[ijiri] meddling
弄る[ijiru] to touch
嘲弄[chourou] scorn
弄ぶ[moteasobu] to play with (a toy, one's hair, etc.)