: a weight hung from a point so as to swing freely back and forth under the action of gravity
Word Root of PENDULUM
The Latin word pendere, meaning “to cause to hang down,” gives us the root pend. Words from the Latin pendere have something to do with hanging. To suspend is to cause something to hang down from a single point. To depend is to hang, or rely, on the support of others. A pendant is an ornament that hangs free, as on a necklace. A pendulum is an object hung from a point that swings freely back and forth, as in a clock.