Merriam-Webster's Collegiate® Dictionary, 11th Edition
PRANK
I. noun
Etymology: obsolete prank to play tricks
Date: circa 1529
trick:, a malicious act, a mildly mischievous act, a ludicrous act,
II. verb
Etymology: probably from Dutch pronken to strut; akin to Middle High German gebrunkel glitter of metal
Date: 15th century
intransitive verb to show oneself off, transitive verb to dress or adorn gaily or showily