mischievously mischievously /ˈmɪsʧɪvəsli/

adverb

1. In a disobedient or naughty way  ( badly , mischievously , naughtily )
   in a disobedient or naughty way
    He behaved badly in school
   he behaved badly in school
    He mischievously looked for a chance to embarrass his sister
   he mischievously looked for a chance to embarrass his sister
    Behaved naughtily when they had guests and was sent to his room
   behaved naughtily when they had guests and was sent to his room