tumble

tumble - noun

an acrobatic feat of rolling or turning end over end

a sudden drop from an upright position

tumble - verb

fall down, as if collapsing
cause to topple or tumble by pushing
roll over and over, back and forth
fly around
fall apart
throw together in a confused mass
understand, usually after some initial difficulty
fall suddenly and sharply
put clothes in a tumbling barrel, where they are whirled about in hot air, usually with the purpose of drying
suffer a sudden downfall, overthrow, or defeat
do gymnastics, roll and turn skillfully