artero

adj. tricky

= devious, duplicitous, two-faced.
Ex: The article is entitled 'The devious, the distraught and the deranged: designing and applying personal safety into library protection'.
Ex: This remake of William Castle's action adventure adds a genuinely supernatural plot to the old story of the duplicitous wife scheming to kill her husband but being one-upped by his even more ingenious counterplots.
Ex: This course looks at this two-faced society with guided field trips to cemeteries and to the architecture of Edinburgh's underworld below the great banks and public buildings.