奸 - wickedness, mischief, rudeness

Chinese traitor (esp. a collaborator with the Japanese)

wicked design; vicious plan; plot

evil thief; wicked robber

disloyal retainer; treacherous subject

letter explaining the reasons for cutting down an alleged villain; assassin's written vindication of his killing

cunning; craft; wiles

shrewd (dirty) trick; sinister scheme (design); sly art

cunning; sly

cunning and wickedness

wicked person; evil thing

wiles and cunning; craftiness and treachery

killing a villain (with a sword, dagger, etc.)