arch, impish, implike, mischievous, pixilated, prankish, puckish, wicked (adj)

naughtily or annoyingly playful

"teasing and worrying with impish laughter"; "a wicked prank"

impish (Adjective)

mischievous; of or befitting an imp.

impish

An imp is a European mythological being similar to a fairy or demon, frequently described in folklore and superstition. The word may perhaps derive from the term ympe, used to denote a young grafted tree. Imps are often described as troublesome and mischievous more than seriously threatening or dangerous, and as lesser beings rather than more important supernatural beings. The attendants of the devil are sometimes described as imps. They are usually described as lively and having small stature.