As an adjective prankish
is given to or characterized by impishness or playfulness; mischievous.
As an adverb prankishly is
in a prankish way.
prankish
English
Adjective
(
en adjective)
Given to or characterized by impishness or playfulness; mischievous.
Synonyms
* (naughtily or annoyingly playful) impish, mischievous, pixilated, implike, puckish