tottering

动词 totter:

1. move without being stable, as if threatening to fall
   同义词：totter
2. walk unsteadily
   同义词：toddle, coggle, totter, dodder, paddle, waddle
3. move unsteadily, with a rocking motion
   同义词：teeter, seesaw, totter

形容词 tottering:

1. unsteady in gait as from infirmity or old age
   同义词：tottery
2. (of structures or institutions) having lost stability; failing or on the point of collapse

1. The piles of books tottered and then fell.
   这堆书晃了几下，然后就倒了。
2. A staggering or tottering movement or gait.
   蹒跚的步态左右摆晃或蹒跚的动作或步态