tormenter

/tɔrˈmɛntər/
noun
  1. A person or thing that causes someone to suffer severe physical or mental pain.
    • Her older brother acted as her constant tormenter, always playing mean pranks.
    • The mosquito was a tiny tormenter that kept her awake all night.
    • The villain in the movie was a cruel tormenter who enjoyed causing fear.
What does "tormenter" mean? | whatsthatwordmean | whatsthatwordmean