Mischief is a vexatious or annoying action, or, conduct or activity that playfully causes petty annoyance. Young children, when they hear of mischief, think of practical jokes. The etymology of the word comes from Old French meschief, which means "misfortune,' from meschever, "to end badly.
OmegaWiki Dictionary
Ω
mischief Harm or evil caused by an agent or brought about by a particular cause.