mischief
Pronunciation: /ˈmɪstʃɪf/
noun
- 1playful misbehaviour, especially on the part of children: she’ll make sure Danny doesn’t get into mischief
- playfulness that is intended to tease or create trouble: her eyes twinkled with irrepressible mischief


Origin:
late Middle English (denoting misfortune or distress): from Old French meschief, from the verb meschever, from mes- 'adversely' + chever 'come to an end' (from chef 'head')