duō duān
multifarious
multifold
many and varied
multiport
multistation
multiterminal
biàn huà duō duān
changeable
changing
varied
full of changes
guǐ jì duō duān
deceitful in many ways (idiom); wily and mischievous
full of craft and cunning
guǐ jì duō duān
full of devilish tricks and cunning stratagems (idiom)
sly
crafty
malicious