(typically of a person) fall suddenly, clumsily, or headlong.
she pitched forward, tumbling down the remaining stairs
understand the meaning or hidden implication of (a situation).
she tumbled to our scam
perform acrobatic or gymnastic exercises, typically handsprings and somersaults in the air.
On floor exercise one gymnast tumbled a double layout, two whips to double pike, and stuck full-in dismount.
clean (castings, gemstones, etc.) in a tumbling barrel.