動詞 totter:

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

形容詞 tottering:

1. unsteady in gait as from infirmity or old age
   同義詞：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.
   這堆書晃了幾下，然后就倒了。
2. A staggering or tottering movement or gait.
   蹣跚的步態(tài)左右擺晃或蹣跚的動作或步態(tài)