This meaning refers to being clever in a deceitful way, often involving cunning or trickery to achieve one's goals.

This meaning indicates a harsh and cruel nature, often involving malevolence or ill intentions.

This meaning describes a lack of moral principles or ethics, suggesting a willingness to act dishonestly or immorally.

This meaning can refer to being quick in understanding or reacting, but can also imply a harshness in behavior or manner.