lasher

/ˈlæʃər/
noun
  1. A person who uses a whip or lash, especially as a punishment.
    • The movie depicted a cruel lasher in the slave market.
    • The lasher raised his whip and struck the prisoner.
    • In ancient times, a lasher would carry out floggings in public.
  2. A device or part that lashes or strikes, such as a whip or a moving part in machinery.
    • The lasher on the old clock swung back and forth.
    • He replaced the worn lasher on the threshing machine.
    • The machine's lasher snapped against the conveyor belt.