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| Date: | 1300-1400 |
| Origin: | Probably from a Scandinavian language |
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stum‧ble
[intransitive]
[intransitive]1 to hit your foot against something or put your foot down awkwardly while you are walking or running, so that you almost fall [= trip]: 
In her hurry she stumbled and spilled the milk all over the floor.
In her hurry she stumbled and spilled the milk all over the floor.2 to walk in an unsteady way and often almost fall [= stagger]
3 to stop or make a mistake when you are reading to people or speaking
—stumble noun [countable]
stumble on/across/upon something
phrasal verbResearchers have stumbled across a drug that may help patients with Parkinson's disease.