vt.

1. 抚弄；转动
   What is that thing you are twiddling in your hands?

   你手中摆弄的东西是什么？

vi.

1. 玩弄；捻弄[（+with）]

n.

1. 旋弄；摆弄；玩弄
2. 转动

v.

1. play or fiddle with, typically in a purposeless or nervous way.
2. archaic turn or move in a twirling way.

n.

1. an act of twiddling.
2. a rapid or intricate series of musical notes.