mischievously

Từ điển WordNet v3.1 - WordNet Dictionary

adverb

in a disobedient or naughty way
- he behaved badly in school
- he mischievously looked for a chance to embarrass his sister
- behaved naughtily when they had guests and was sent to his room
• Syn:
badly, naughtily
• Derived from adjective:
naughty (for: naughtily)