mischief
mis-chief
noun
Playful bad behaviour causing minor trouble, annoyance, or damage.
"The children were always up to mischief."
Thesaurus
Synonyms: roguery, shenanigan, mischief-making, rascality, mischievousness, roguishness, devilment, devilry, deviltry, maleficence, balefulness
Antonyms: beneficence