prankster (noun) prankster: mischief
Sinonime: accustom,
brainwash,
build up,
educate,
equip, habituate, inure, loosen up, make ready,
modify,
practice,
program,
ready, shape up,
sharpen, tone up, toughen up,
train, warm up, whip into shape,
work out, work over