She stumbled over the books on the floor.
As he stumbled about, he ran right into a tree.
WordNet 3.0 Sense Numbers: 1, 2
At last, he's stumbled onto something good.
I stumbled across some information you may find interesting.
WordNet 3.0 Sense Numbers: 3
The Japanese have watched the Europeans and Canadians stumble in the U.S. market.
They stumbled when asked how many siblings Kevin had, finally agreeing
on three brothers and three sisters.
Unfortunately, they stumbled by crafting a game that's too simple for strategy
gamers, and too convoluted for kids.
WordNet 3.0 Sense Numbers: 4