1. (

• stumble ,
• falter ,
• bumble

) walk unsteadily; "The drunk man stumbled about" ;

2. (

• stumble ,
• trip

) miss a step and fall or nearly fall; "She stumbled over the tree root" ;

3. (

• stumble ,
• hit ,

) encounter by chance; "I stumbled across a long-lost cousin last night in a restaurant" ;

4. (

• stumble ,
• slip_up ,
• trip_up ,

) make an error; "She slipped up and revealed the name" ;