作 怪

(of a ghost) to make strange things happen
to act up
to act behind the scenes
to make mischief
odd
to misbehave (euphemism for having sex)

Appears in

兴妖作怪xīng yāo zuò guàilit. to summon demons to create havoc (idiom)丑人多作怪chǒu rén duō zuò guài(saying) unattractive or untalented people tend to make spectacles of themselves