Mischievous

прилагательное 1) озорной; непослушный Синоним(ы): unruly, disobedient, naughty Антоним(ы): obedient 2) вредный, приносящий вред Синоним(ы): harmful, injurious

Большой англо-русский словарь

Mischievous

adjective 1. harmful, injurious Example: mischievous gossip 2. a. able or tending to cause annoyance, trouble, or minor injury b. irresponsibly playful Example: mischievous behaviormischievously adverbmischievousness noun Usage: A pronunciation [mis-ˈchē-vē-əs] and a consequent spelling mischievious are of long standing: evidence for the spelling goes back to the 16th century. Our pronunciation files contain modern attestations ranging from dialect speakers to Herbert Hoover. But both the pronunciation and the spelling are still considered nonstandard.

Энциклопедический словарь Мерриама-Вебстера