1. 有害地：mischievous 有害的 | mischievously 有害地 | mischoose 误择

2. 加害地：mischievously 加害地 | mischievouslynaughtilyslily 顽皮地 | mischievousobstinatetoplaystupidstubbornnaughty 顽

adv

1. in a disobedient or naughty way

e.g. 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

Synonym: badlynaughtily