mischief

/ˈmɪstʃɪf/
noun
  1. Playful behavior that causes minor trouble or annoyance, often in a harmless way.
    • There was a gleam of mischief in her eyes before she hid her brother's phone.
    • The children's mischief included putting salt in the sugar bowl.
    • The puppy got into mischief by unrolling all the toilet paper in the bathroom.
  2. Harm or damage caused by someone or something, often deliberately.
    • The storm caused great mischief to the coastal towns, flooding many homes.
    • The hacker's mischief shut down the company's website for hours.
    • Spreading false rumors can do real mischief to a person's reputation.
Antonyms
What does "mischief" mean? | whatsthatwordmean | whatsthatwordmean