knavish | rascally, mischievous, roguish |
mischievous | harmful, damaging, injurious |
pestiferous | pestilent, mischievous, pernicious |
shrewd | wily, cunning, mischievous |
wag | fellow, lad, mischievous boy |
waggish | playful, mischievous, impish |
wanton | [jocularly] naughty, wicked, mischievous |