"Evil" is a symbol of a crafty, insincere, hypocritical person, having spiritual, moral defectiveness, "crookedness", falsehood of his worldview and way of life.  

"Evilness" is an image of hidden opposition to the Will of God by a cunning person; anything that has some lack of straightness, some spiritual, moral "flaw," falsity regarding the straight Path of following God's Commandments.

 "Craftiness" is a special kind of lying, covert guile, crookedness, fickleness in thought and deed, a varied, veiled expression of cunning in evil intentions and actions toward another person.