pendulum

/ˈpɛndʒələm/
noun
  1. A weight hung from a fixed point so that it can swing freely, especially one used to regulate the movement of a clock.
    • The grandfather clock's pendulum swung steadily back and forth.
    • He used a pendulum to demonstrate the laws of motion to the class.
    • The old pendulum in the tower kept perfect time for over a century.
  2. Something that swings back and forth between two extremes, such as an opinion, trend, or situation.
    • The political pendulum has swung from left to right over the past decade.
    • The pendulum of public opinion shifted dramatically after the scandal.
    • Fashion is a pendulum, always returning to styles from earlier decades.
What does "pendulum" mean? | whatsthatwordmean | whatsthatwordmean