verb / noun
tumble
TUM-bul/ˈtʌmbl/
To fall or turn over repeatedly.
He catches his toe on a raised paving stone and tumbles forward.

Etymology
Possibly formed from a verb meaning “fall, leap, dance” with a repetitive suffix, tumble connects helpless falling with the turning movements also found in acrobatics.
In context
they would howl and grin and chatter and reel and Tumble and then fall asleep in the mud
More examples
- Loose rocks tumble down the steep hillside.
- She takes a tumble but gets up unhurt.
- The gymnast tumbles across the mat.
Forms
tumble · tumbles · tumbled · tumbling
tumbler noun — A person who performs rolls and somersaults.