vi.

1. 绊脚，绊倒[（+on/over）]
   He stumbled on the staircase and hurt his leg.

   他在楼梯上绊了一跤，伤了腿。

2. 踉跄，蹒跚而行[Q][（+along）]
   The tired old man stumbled along.

   那位疲惫的老人蹒跚而行。

3. 结结巴巴地说；踌躇[（+at/over）]
   The boy stumbled through his recitation.

   这男孩结结巴巴地背诵。

4. 失足，犯错误；步入歧途[（+into）]
   The waiter stumbled several times over our order.

   那位侍者好几次弄错了我们点的菜。

5. 偶然碰见，碰巧发现[（+on/upon/across）]
   I stumbled upon the rare book in a second-hand bookstore.

   我在一家旧书店偶然找到这本珍贵的书。

vt.

1. 使绊脚，绊倒
   In the darkness he stumbled his shin against the bed post.

   黑暗中他的小腿绊在了床柱上。

2. 使迟疑不决，使踌躇
   The problem stumbled him.

   这个问题把他难住了。

n.

1. 绊倒；失足；错误[C]

v.

1. trip or momentarily lose one's balance.
   ▸walk unsteadily.
2. make a mistake or repeated mistakes in speaking.
3. (stumble across/on/upon) find by chance.

n.