fall suddenly, clumsily, or headlong

she pitched forward, tumbling down the remaining stairs

perform acrobatic feats, typically handsprings and somersaults in the air

dry (washing) in a tumble dryer

the machine gentle tumbles the clothes in cool air for ten minutes

understand the meaning or hidden implication of (a situation)

she'll ring again as soon as she tumbles to what she's done

have sex with

he was tumbling a strange woman

clean (castings, gemstones, etc.) in a tumbling barrel