waggles

n.causing to move repeatedly from side to side

同义词：wagshake

v.

move from side to side

同义词：wag

move unsteadily or with a weaving or rolling motion

同义词：wamble

1. The dog waggles its tail every time it sees its owner.
   每次看到主人，狗都会摇尾巴。
2. She waggles the pencil in her hand while thinking about the problem.
   她在思考问题时摇晃手中的铅笔。