General Deviousness:
* Fraudulentus: This implies deception and trickery, emphasizing the act of misleading.
* Dolus: Refers to a cunning and deceitful plan or scheme.
* Astutus: Means clever or cunning, but can be used in a neutral or even positive context.
More specific connotations:
* Subdolus: Emphasizes the hidden and subtle nature of deviousness.
* Perfidus: Specifically refers to being treacherous or untrustworthy.
* Callidus: Means skillful or shrewd, but with a suggestion of being manipulative.
The best Latin term to use depends on the specific context and the shade of meaning you want to convey.