1) Apt to play tricks 2) Archly naughty 3) Bratty 4) Grin descriptive 5) Implike 6) Like a little devil 7) Like a mischief-maker 8) Like a mischievous child 9) Like a playful prankster 10) Mischievous 11) Naughty 12) Naughty, but not too 13) Pixilated 14) Playful 15) Prankish 16) Prone to mischief 17) Prone to pranks 1) Arch 2) Disobedient 3) Elfin 4) Imp-like 5) Mischievous 6) Naughty 7) Pixilated 8) Playful 9) Prankish 10) Puckish 11) Rascally 
Imp'ish (ĭmp'ĭsh) adjective Having the qualities, or showing the characteristics, of an imperfect 
[adj] - naughtily or annoyingly playful
implike adjective naughtily or annoyingly playful; `teasing and worrying with impish laughter`; `a wicked prank`
mischievous. · of, pertaining to, or characteristic of an imp.